Company lists · Data refreshed September 2026
Top 19 Patent management companies based in Japan
RevenueBase identified 67 company matches for patent management companies associated with Japan as of September 2026 and tracks 1,512 professional contacts across them, including 240 with verified work emails. Tokyo is the largest hub.
This list covers company matches for patent management companies associated with Japan, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 21, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 19 largest patent management companies based in Japan
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,189 contacts → | ||||
Exact match “ADKADK3ADKADKADK ADK ADK ADK ADK IP(Intellectual Property)” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 2 | 58 contacts → | ||||
Exact match “SHIGA International Patent Office is one of the largest IP firms in Japan with more than 140 patent and trademark attorneys.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 3 | 31 contacts → | ||||
Exact match “SUGIMURA & Partners, founded in 1923 as Sugimura International Patent & Trademark Attorneys, is a leading IP firm.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 4 | 30 contacts → | ||||
Exact match “NGB Corporation is a legal services company based out of Minato, Tokyo, Japan.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 5 | 19 contacts → | ||||
Exact match “SONDERHOFF & EINSEL PATENT OFFICE Shin-Marunouchi Center Buillding 18th Floor 1-6-2 Marunouchi, Chiyoda-ku Tokyo Japan Tel:+81-3-5220-6500 (Main) Fax:+81-3-5220-6556 Website…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 6 | 10 contacts → | ||||
Exact match “Authense IP is a group of patent attorneys with abundant experience in domestic and foreign IP enrollment, that enables us to provide quality service working closely with clients…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 7 | 10 contacts → | ||||
Exact match “CREO Law & Intellectual Property was established in 1978, and now has a full-time staff of approximately 50 personnel, including 13 patent attorneys, 3 lawyers and a native…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 8 | 10 contacts → | ||||
Exact match “Established in 1998 by Mr.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 9 | 9 contacts → | ||||
Exact match “On January 1, Primeworks IP Attorneys began services to assist clients with intellectual property related matters.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 10 | 9 contacts → | ||||
Exact match “Kéisén Associates, formerly Omori & Yaguchi, is a Tokyo-based Japanese intellectual property law firm with offices in Tokyo, Philadelphia and New York City.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 11 | 4 contacts → | ||||
Exact match “In the heart of Minatomirai, Yokohama, Olive International Patent Office was established on October 1, 2003.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 12 | 3 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 13 | 2 contacts → | ||||
Exact match “Tass Meister Patent Firm consists of patent attorneys and technical experts possessing advanced knowledge in their specialized areas.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 14 | 1 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 15 | 1 contacts → | ||||
Exact match “IPHub Services LLC provides overseas patent prosecution supports to mainly Japanese patent/intellectual property firms.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 16 | 1 contacts → | ||||
Exact match “Intellectual Property Professionals We provide professional IP service to Japanese clients and foreign clients.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 17 | 1 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 18 | 1 contacts → | ||||
Exact match “Syndefense provides IP advisory and consulting services to companies, research institutions and individuals.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 19 | 1 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “patent management companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 19 of 67 patent management companies based in Japan
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Patent management companies based in Japan at a glance
As of Sep 21, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for Japan, so it is reported there. Company counts and contact totals on this page are exact for Japan, over 67 companies.
How this list was built
The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Company records associated with Japan whose business descriptions match “patent management companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
- RevenueBase SmartSearch
- Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
- Public preview
- The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
- Match quality
- RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every displayed company carries at least one verified work email. RevenueBase tracks 240 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 21, 2026. Lists refresh periodically as the graph is re-checked.
- Record context
- Company records and descriptions can change. Check the company's website for its current services and locations.
Frequently asked
What is RevenueBase SmartSearch?
RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “patent management companies”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many patent management companies are there based in Japan?
RevenueBase identified 67 company matches for patent management companies associated with Japan as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.
What is the largest company on this list?
ADK tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most patent management companies?
Tokyo leads with 29 company records, followed by Jing (6) and Xian (2).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 240 professional contacts with verified work emails tracked across these 67 companies; direct dials are available where recorded.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 21, 2026.
Ready to reach these companies? Verified emails and direct dials for all 67 patent management companies based in Japan. Start with a free account, no credit card.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
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Company intelligence · public preview
Top 19 patent management companies based in Japan
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 67 matching company records for patent management companies based in Japan, with 1,512 tracked contacts and 240 verified work emails.
This public preview shows 19 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 21, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 19 patent management companies based in Japan
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  ADKadk.jpHQ: Tokyo, JapanReported employees: 1,001-5,000 | Tokyo, Japan | 1,001-5,000 | Exact match | 1,189 contacts → |
“ADKADK3ADKADKADK ADK ADK ADK ADK IP(Intellectual Property)” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Shiga International Patent Officeshigapatent.comHQ: Tokyo, JapanReported employees: 501-1,000 | Tokyo, Japan | 501-1,000 | Exact match | 58 contacts → |
“SHIGA International Patent Office is one of the largest IP firms in Japan with more than 140 patent and trademark attorneys.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Sugimura & Partnerssugimura.partnersHQ: Chiyoda-ku, JapanReported employees: 201-500 | Chiyoda-ku, Japan | 201-500 | Exact match | 31 contacts → |
“SUGIMURA & Partners, founded in 1923 as Sugimura International Patent & Trademark Attorneys, is a leading IP firm.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  NGB Corporationngb.co.jpHQ: Minato, JapanReported employees: 11-50 | Minato, Japan | 11-50 | Exact match | 30 contacts → |
“NGB Corporation is a legal services company based out of Minato, Tokyo, Japan.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Sonderhoff & Einsel Patent Officepatent.se1910.comHQ: Chiyoda-ku, JapanReported employees: 51-200 | Chiyoda-ku, Japan | 51-200 | Exact match | 19 contacts → |
“SONDERHOFF & EINSEL PATENT OFFICE Shin-Marunouchi Center Buillding 18th Floor 1-6-2 Marunouchi, Chiyoda-ku Tokyo Japan Tel:+81-3-5220-6500 (Main) Fax:+81-3-5220-6556 Website…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Authense IPauthense-ip.comHQ: Tokyo, JapanReported employees: 1-10 | Tokyo, Japan | 1-10 | Exact match | 10 contacts → |
“Authense IP is a group of patent attorneys with abundant experience in domestic and foreign IP enrollment, that enables us to provide quality service working closely with clients…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Creo LAW & IP LPC クレオ国際法律特許事務所nipo.gr.jpHQ: Tokyo, JapanReported employees: 11-50 | Tokyo, Japan | 11-50 | Exact match | 10 contacts → |
“CREO Law & Intellectual Property was established in 1978, and now has a full-time staff of approximately 50 personnel, including 13 patent attorneys, 3 lawyers and a native…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | HQ: Chiyodaku, JapanReported employees: 201-500 | Chiyodaku, Japan | 201-500 | Exact match | 10 contacts → |
“Established in 1998 by Mr.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Primeworks IP Attorneysprimeworks-ip.comHQ: Tokyo, JapanReported employees: 51-200 | Tokyo, Japan | 51-200 | Exact match | 9 contacts → |
“On January 1, Primeworks IP Attorneys began services to assist clients with intellectual property related matters.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Keisen Associateskeisenassociates.comHQ: Tokyo, JapanReported employees: 11-50 | Tokyo, Japan | 11-50 | Exact match | 9 contacts → |
“Kéisén Associates, formerly Omori & Yaguchi, is a Tokyo-based Japanese intellectual property law firm with offices in Tokyo, Philadelphia and New York City.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Olive Intellectual Property Firmip-olive.jpHQ: 横浜市西区みなとみらい２－２－１, JapanReported employees: 11-50 | 横浜市西区みなとみらい２－２－１, Japan | 11-50 | Exact match | 4 contacts → |
“In the heart of Minatomirai, Yokohama, Olive International Patent Office was established on October 1, 2003.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Scienbizip-Japanscienbizip.jpHQ: 阿倍野区, JapanReported employees: 201-500 | 阿倍野区, Japan | 201-500 | Exact match | 3 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 13 |  Tass Meister Patent Firmtassmeister.comHQ: Chiyoda-ku, JapanReported employees: 11-50 | Chiyoda-ku, Japan | 11-50 | Exact match | 2 contacts → |
“Tass Meister Patent Firm consists of patent attorneys and technical experts possessing advanced knowledge in their specialized areas.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | (株)デンネマイヤーdennemeyer.co.jp HQ: 港区, JapanReported employees: 11-50 | 港区, Japan | 11-50 | Exact match | 1 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 15 |  Iphub Services LLCiphub.co.jpHQ: 横浜市西区, JapanReported employees: 1-10 | 横浜市西区, Japan | 1-10 | Exact match | 1 contacts → |
“IPHub Services LLC provides overseas patent prosecution supports to mainly Japanese patent/intellectual property firms.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Aperio IP Attorneysaperio-ip.comHQ: Tokyo, JapanReported employees: 1-10 | Tokyo, Japan | 1-10 | Exact match | 1 contacts → |
“Intellectual Property Professionals We provide professional IP service to Japanese clients and foreign clients.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | IP Firm Shuwashuwa.net HQ: Tokyo, JapanReported employees: 1-10 | Tokyo, Japan | 1-10 | Exact match | 1 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 18 |  Syndefensesyndefense.comHQ: Kamakura, JapanReported employees: 1-10 | Kamakura, Japan | 1-10 | Exact match | 1 contacts → |
“Syndefense provides IP advisory and consulting services to companies, research institutions and individuals.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Maxwell International IP LAW Firmmaxwell-ip.jpHQ: Nerima-ku, JapanReported employees: 1-10 | Nerima-ku, Japan | 1-10 | Exact match | 1 contacts → |
No recorded description excerpt is available for this public record. | |||||
Showing 19 of 67 company matches
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Patent management companies: dataset insights
September 21, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
66 records in the displayed employee bands.
1 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured worldwide rather than for Japan, so it is reported there. Company counts and contact totals on this page are exact for Japan, over 67 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 21, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for patent management companies?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many patent management companies did RevenueBase find based in Japan?
The saved snapshot records 67 matching company records, 1,512 tracked contacts and 240 verified emails. The public preview displays 19 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 21, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
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Browse the directory
Cite this list
RevenueBase Data Team. Top 19 patent management companies based in Japan. Snapshot: September 21, 2026. https://revenuebase.ai/companies/patent-management-companies/japan.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Patent management companies based in Bangalore, India
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Company intelligence · public preview
Top 19 patent management companies based in Japan
RevenueBase records 67 matching company records for patent management companies based in Japan, with 1,512 tracked contacts and 240 verified work emails.
This public preview shows 19 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 21, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 19 patent management companies based in Japan
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | ADKadk.jp HQ: Tokyo, JapanReported employees: 1,001-5,000 | Tokyo, Japan | 1,001-5,000 | Exact match | 1,189 contacts → |
“ADKADK3ADKADKADK ADK ADK ADK ADK IP(Intellectual Property)” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Shiga International Patent Officeshigapatent.com HQ: Tokyo, JapanReported employees: 501-1,000 | Tokyo, Japan | 501-1,000 | Exact match | 58 contacts → |
“SHIGA International Patent Office is one of the largest IP firms in Japan with more than 140 patent and trademark attorneys.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Sugimura & Partnerssugimura.partners HQ: Chiyoda-ku, JapanReported employees: 201-500 | Chiyoda-ku, Japan | 201-500 | Exact match | 31 contacts → |
“SUGIMURA & Partners, founded in 1923 as Sugimura International Patent & Trademark Attorneys, is a leading IP firm.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | NGB Corporationngb.co.jp HQ: Minato, JapanReported employees: 11-50 | Minato, Japan | 11-50 | Exact match | 30 contacts → |
“NGB Corporation is a legal services company based out of Minato, Tokyo, Japan.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Sonderhoff & Einsel Patent Officepatent.se1910.com HQ: Chiyoda-ku, JapanReported employees: 51-200 | Chiyoda-ku, Japan | 51-200 | Exact match | 19 contacts → |
“SONDERHOFF & EINSEL PATENT OFFICE Shin-Marunouchi Center Buillding 18th Floor 1-6-2 Marunouchi, Chiyoda-ku Tokyo Japan Tel:+81-3-5220-6500 (Main) Fax:+81-3-5220-6556 Website…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Authense IPauthense-ip.com HQ: Tokyo, JapanReported employees: 1-10 | Tokyo, Japan | 1-10 | Exact match | 10 contacts → |
“Authense IP is a group of patent attorneys with abundant experience in domestic and foreign IP enrollment, that enables us to provide quality service working closely with clients…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Creo LAW & IP LPC クレオ国際法律特許事務所nipo.gr.jp HQ: Tokyo, JapanReported employees: 11-50 | Tokyo, Japan | 11-50 | Exact match | 10 contacts → |
“CREO Law & Intellectual Property was established in 1978, and now has a full-time staff of approximately 50 personnel, including 13 patent attorneys, 3 lawyers and a native…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | HQ: Chiyodaku, JapanReported employees: 201-500 | Chiyodaku, Japan | 201-500 | Exact match | 10 contacts → |
“Established in 1998 by Mr.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Primeworks IP Attorneysprimeworks-ip.com HQ: Tokyo, JapanReported employees: 51-200 | Tokyo, Japan | 51-200 | Exact match | 9 contacts → |
“On January 1, Primeworks IP Attorneys began services to assist clients with intellectual property related matters.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Keisen Associateskeisenassociates.com HQ: Tokyo, JapanReported employees: 11-50 | Tokyo, Japan | 11-50 | Exact match | 9 contacts → |
“Kéisén Associates, formerly Omori & Yaguchi, is a Tokyo-based Japanese intellectual property law firm with offices in Tokyo, Philadelphia and New York City.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Olive Intellectual Property Firmip-olive.jp HQ: 横浜市西区みなとみらい２－２－１, JapanReported employees: 11-50 | 横浜市西区みなとみらい２－２－１, Japan | 11-50 | Exact match | 4 contacts → |
“In the heart of Minatomirai, Yokohama, Olive International Patent Office was established on October 1, 2003.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Scienbizip-Japanscienbizip.jp HQ: 阿倍野区, JapanReported employees: 201-500 | 阿倍野区, Japan | 201-500 | Exact match | 3 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 13 | Tass Meister Patent Firmtassmeister.com HQ: Chiyoda-ku, JapanReported employees: 11-50 | Chiyoda-ku, Japan | 11-50 | Exact match | 2 contacts → |
“Tass Meister Patent Firm consists of patent attorneys and technical experts possessing advanced knowledge in their specialized areas.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | (株)デンネマイヤーdennemeyer.co.jp HQ: 港区, JapanReported employees: 11-50 | 港区, Japan | 11-50 | Exact match | 1 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 15 | Iphub Services LLCiphub.co.jp HQ: 横浜市西区, JapanReported employees: 1-10 | 横浜市西区, Japan | 1-10 | Exact match | 1 contacts → |
“IPHub Services LLC provides overseas patent prosecution supports to mainly Japanese patent/intellectual property firms.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Aperio IP Attorneysaperio-ip.com HQ: Tokyo, JapanReported employees: 1-10 | Tokyo, Japan | 1-10 | Exact match | 1 contacts → |
“Intellectual Property Professionals We provide professional IP service to Japanese clients and foreign clients.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | IP Firm Shuwashuwa.net HQ: Tokyo, JapanReported employees: 1-10 | Tokyo, Japan | 1-10 | Exact match | 1 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 18 | Syndefensesyndefense.com HQ: Kamakura, JapanReported employees: 1-10 | Kamakura, Japan | 1-10 | Exact match | 1 contacts → |
“Syndefense provides IP advisory and consulting services to companies, research institutions and individuals.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Maxwell International IP LAW Firmmaxwell-ip.jp HQ: Nerima-ku, JapanReported employees: 1-10 | Nerima-ku, Japan | 1-10 | Exact match | 1 contacts → |
No recorded description excerpt is available for this public record. | |||||
Showing 19 of 67 company matches
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Patent management companies: dataset insights
September 21, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
66 records in the displayed employee bands.
1 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured worldwide rather than for Japan, so it is reported there. Company counts and contact totals on this page are exact for Japan, over 67 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 21, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for patent management companies?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many patent management companies did RevenueBase find based in Japan?
The saved snapshot records 67 matching company records, 1,512 tracked contacts and 240 verified emails. The public preview displays 19 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 21, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
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Browse the directory
Cite this list
RevenueBase Data Team. Top 19 patent management companies based in Japan. Snapshot: September 21, 2026. https://revenuebase.ai/companies/patent-management-companies/japan.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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