Company lists · Data refreshed September 2026
Top 25 Appellate patent law firms worldwide
RevenueBase identified 2,733 appellate patent law firms worldwide as of September 2026 and tracks 42,657 professional contacts across them, including 23,175 with verified work emails. The United States is the largest market and New York the largest hub.
This list covers appellate patent law firms worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 27, 2026. Country and city lists for appellate patent law firms follow the table.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 25 largest appellate patent law firms worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,167 contacts → | ||||
Partial evidence “As the leading intellectual property law firm, we help innovators change the world through our unmatched litigation, prosecution, and post-grant experience across venues and…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 2 | 1,126 contacts → | ||||
Partial evidence “Fenwick is a leading law firm, purpose-built to guide visionary tech and life sciences companies and their investors through every stage of growth, from startups securing their…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 3 | 936 contacts → | ||||
Indirect evidence “When your most valuable assets are ideas, innovation, and brand-you need the best.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 4 | 859 contacts → | ||||
Partial evidence “Freeman Mathis & Gary, LLP is a nationally recognized Am Law 200 law firm with over 500 attorneys servicing clients in 37 offices and 21 states.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 5 | 685 contacts → | ||||
Indirect evidence “With over 400 attorneys in offices in Albuquerque, Ambler (PA), Atlanta, Austin, Baton Rouge, Bethlehem (PA), Birmingham, Boston, Charleston, Dallas, Denver, Gulfport, Huntsville…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 6 | 606 contacts → | ||||
Indirect evidence “Knobbe Martens protects the ideas that drive innovation and propel our world forward.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 7 | 521 contacts → | ||||
Partial evidence “Smart & Biggar is a Canadian intellectual property law firm.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 8 | 481 contacts → | ||||
Partial evidence “Tucker Ellis LLP is a full-service law firm of more than 240 lawyers serving clients from “11 Long Hallways” nationwide: Atlanta, Chicago, Cleveland, Columbus, Los Angeles…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 9 | 468 contacts → | ||||
Partial evidence “Sterne, Kessler, Goldstein & Fox is a full-service intellectual property law firm that provides innovative solutions tailored to your business and industry.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 10 | 454 contacts → | ||||
Partial evidence “K&S Partners is a leading intellectual property law firm in India, offering a full range of IP management services to clients worldwide, including Fortune 500 companies.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 11 | 428 contacts → | ||||
Indirect evidence “Wolf, Greenfield & Sacks, P.C.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 12 | 317 contacts → | ||||
Strong evidence “An intellectual property law firm at the leading edge of patent, trademark and copyright law, licensing agreements, trade secret litigation, and more, expect a unique combination…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 13 | 310 contacts → | ||||
Indirect evidence “With 130 trial lawyers across offices in Austin, Dallas, Houston, Los Angeles, Marshall, New York, and Washington, D.C, McKool Smith has established a reputation as one of…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 14 | 288 contacts → | ||||
Indirect evidence “For more than 100 years Banner Witcoff has provided sound protection and inventive intellectual property solutions for some of the world’s most innovative organizations.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 15 | 283 contacts → | ||||
Indirect evidence “Lathrop Gage clients are the backbone of our economy.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 16 | 266 contacts → | ||||
Strong evidence “Harness IP’s team of patent and trademark attorneys serve clients in all areas of intellectual property law.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 17 | 258 contacts → | ||||
Partial evidence “Irell & Manella LLP is a law firm focused on complex commercial and IP litigation.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 18 | 254 contacts → | ||||
Indirect evidence “Swanson, Martin & Bell, LLP was founded in 1992 by a group of trial lawyers who left a large Chicago firm to better serve the needs of their clients.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 19 | 250 contacts → | ||||
Indirect evidence “Keker, Van Nest & Peters is a trial-practice litigation firm located in San Francisco.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 20 | 242 contacts → | ||||
Partial evidence “Effectual Services is a well established and fast growing patent and legal support services company having experience and expertise in providing patent and legal services.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 21 | 241 contacts → | ||||
Partial evidence “HOFFMANN EITLE is one of the largest intellectual property law firms in Europe.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 22 | 231 contacts → | ||||
Indirect evidence “Wheeler Trigg O’Donnell lawyers have taken more than 1,300 trials, arbitrations, and appeals to verdict, award, or opinion in 45 states and Washington, D.C, with exceptional…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 23 | 227 contacts → | ||||
Indirect evidence “S.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 24 | 223 contacts → | ||||
Partial evidence “EIP is a leading intellectual property law firm, trusted by businesses worldwide to turn innovation into competitive advantage.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 25 | 222 contacts → | ||||
Partial evidence “Cantor Colburn LLP is one of the largest intellectual property specialty law firms in the country, providing clients worldwide with the complete range of IP legal services…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: appellate patent law firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names appellate patent law firms.
- Partial evidence
- Its own public description names part of appellate patent law firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name appellate patent law firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 2,733 appellate patent law firms worldwide
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Appellate patent law firms worldwide at a glance
As of Sep 27, 2026Companies by employee count
Email recency is reported on each country list linked below.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among appellate patent law firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- Coverage
- Every country. Country and city lists for appellate patent law firms are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “appellate patent law firms”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names appellate patent law firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among appellate patent law firms, and records with no verified work email.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- 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 listed company carries at least one verified work email, 23,175 across the full list. 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 27, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Appellate patent law firms by location
19 lists · largest firstEvery Appellate patent law firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Appellate patent law firms based in the United States1,751
- Appellate patent law firms based in Germany139
- Appellate patent law firms based in India64
- Appellate patent law firms based in Canada50
- Appellate patent law firms based in France44
- Appellate patent law firms based in Brazil30
Cities
- Appellate patent law firms based in New York, United States91
- Appellate patent law firms based in Houston, United States79
- Appellate patent law firms based in Chicago, United States65
- Appellate patent law firms based in Washington, United States63
- Appellate patent law firms based in Dallas, United States60
- Appellate patent law firms based in Los Angeles, United States55
- Appellate patent law firms based in Austin, United States50
- Appellate patent law firms based in Atlanta, United States35
- Appellate patent law firms based in San Francisco, United States34
- Appellate patent law firms based in Irvine, United States33
- Appellate patent law firms based in Boston, United States31
- Appellate patent law firms based in Miami, United States28
- Appellate patent law firms based in San Diego, United States25
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names appellate patent law firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many appellate patent law firms are there worldwide?
RevenueBase identified 2,733 appellate patent law firms worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Fish & Richardson P.C, headquartered in Boston, tops this list with the largest team on record.
Which country has the most appellate patent law firms?
The United States leads with 1,751 companies, followed by Germany (139) and India (64). Every appellate patent law firms list by country and city is linked on this page.
Which city has the most appellate patent law firms?
New York leads with 91 headquartered companies, followed by Houston (79) and Chicago (65).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 23,175 verified decision-maker contacts tracked across these 2,733 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 27, 2026.
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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 Smart Search, 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.