Company lists · Data refreshed September 2026

Top 25 Patent prosecution law firms worldwide

Name: Patent prosecution law firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 5,016 companies tracked

RevenueBase identified 5,016 patent prosecution law firms worldwide as of September 2026 and tracks 65,323 professional contacts across them, including 28,353 with verified work emails. The United States is the largest market and New Delhi the largest hub.

This list covers patent prosecution 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 29, 2026. Country and city lists for patent prosecution 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 29, 2026 86% judged on-target in blind review

5,016Companies

65,323Contacts tracked

28,353Verified emails

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The 25 largest patent prosecution law firms worldwide

Ranked by team size

Top 25 of 5,016 patent prosecution law firms worldwide, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to patent prosecution law firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Fish & Richardson P.C	Strong evidence	Boston, MA, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,167 contacts →
	Strong 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 29, 2026
2	Finnegan, Henderson, Farabow, Garrett & Dunner, LLP	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	501-1,000	936 contacts →
	Indirect evidence “When your most valuable assets are ideas, innovation, and brand-you need the best.” Source: RevenueBase Database · checked Sep 29, 2026
3	Knobbe Martens	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 29, 2026	501-1,000	606 contacts →
	Indirect evidence “Knobbe Martens protects the ideas that drive innovation and propel our world forward.” Source: RevenueBase Database · checked Sep 29, 2026
4	ROUSE	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	501-1,000	584 contacts →
	Indirect evidence “Rouse was established in the UK in 1990 and is recognised as a global intellectual property (IP) leader operating as a collaborative network with more than people working out of…” Source: RevenueBase Database · checked Sep 29, 2026
5	Marks & Clerk	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	501-1,000	573 contacts →
	Indirect evidence “We’re true specialists – focusing on IP and IP alone.” Source: RevenueBase Database · checked Sep 29, 2026
6	HGF Limited	Indirect evidence	Leeds, United KingdomHQ checked Sep 29, 2026	201-500	538 contacts →
	Indirect evidence “HGF is one of Europe’s largest firms of Intellectual Property specialists.” Source: RevenueBase Database · checked Sep 29, 2026
7	Smart & Biggar	Partial evidence	Ottawa, ON, CanadaHQ checked Sep 29, 2026	501-1,000	521 contacts →
	Partial evidence “Smart & Biggar is a Canadian intellectual property law firm.” Source: RevenueBase Database · checked Sep 29, 2026
8	Anand And Anand	Partial evidence	New Delhi, IndiaHQ checked Sep 29, 2026	201-500	482 contacts →
	Partial evidence “Anand and Anand is a leading full-service intellectual property law firm, providing end-to-end legal solutions across all facets of intellectual property and allied practice areas.” Source: RevenueBase Database · checked Sep 29, 2026
9	Sterne, Kessler, Goldstein & FOX	Partial evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	201-500	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 29, 2026
10	K&s Partners	Partial evidence	Gurugram, IndiaHQ checked Sep 29, 2026	201-500	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 29, 2026
11	Wolf Greenfield	Indirect evidence	Boston, MA, United StatesHQ checked Sep 29, 2026	201-500	428 contacts →
	Indirect evidence “Wolf, Greenfield & Sacks, P.C.” Source: RevenueBase Database · checked Sep 29, 2026
12	ZACCO	Partial evidence	Copenhagen, DenmarkHQ checked Sep 29, 2026	501-1,000	386 contacts →
	Partial evidence “Zacco is an international full-service IP firm, with around 125 authorised patent attorneys, 75 authorised trademark and design attorneys, and 20 experts in Digital brands and…” Source: RevenueBase Database · checked Sep 29, 2026
13	Spruson & Ferguson	Indirect evidence	Sydney, AustraliaHQ checked Sep 29, 2026	201-500	369 contacts →
	Indirect evidence “Spruson & Ferguson is a leading provider of intellectual property (IP) services across the Asia-Pacific region, with more than 490 staff working from our offices in Bangkok…” Source: RevenueBase Database · checked Sep 29, 2026
14	Khurana & Khurana	Partial evidence	New Delhi, IndiaHQ checked Sep 29, 2026	501-1,000	358 contacts →
	Partial evidence “Khurana & Khurana (K&K) is a full-service Intellectual Property, Tax, Media-Entertainment, and Commercial/Corporate Law firm giving high-end technology backed Corporate/Commercial…” Source: RevenueBase Database · checked Sep 29, 2026
15	Spoor & Fisher	Strong evidence	Pretoria, South AfricaHQ checked Sep 29, 2026	201-500	354 contacts →
	Strong evidence “Spoor & Fisher handles the filing, registration, prosecution and enforcement of trade marks, patents, designs and copyright.” Source: RevenueBase Database · checked Sep 29, 2026
16	Saikrishna & Associates	Partial evidence	Noida, IndiaHQ checked Sep 29, 2026	51-200	346 contacts →
	Partial evidence “Saikrishna & Associates is a Tier-1 full-service Firm having focused Intellectual Property, Telecommunication Media & Technology, Corporate Law & Competition Law verticals backing…” Source: RevenueBase Database · checked Sep 29, 2026
17	Licks Attorneys	Partial evidence	Rio De Janeiro, BrazilHQ checked Sep 29, 2026	201-500	335 contacts →
	Partial evidence “Licks Attorneys is a top-tier Brazilian law firm widely recognized for successfully handling large and strategic Intellectual Property, Life Sciences, Food & Drug, Regulatory…” Source: RevenueBase Database · checked Sep 29, 2026
18	Saba IP	Indirect evidence	Beirut, LebanonHQ checked Sep 29, 2026	201-500	332 contacts →
	Indirect evidence “Founded in 1926, Saba IP is one of the leading intellectual property firms in the Middle East and North Africa.” Source: RevenueBase Database · checked Sep 29, 2026
19	AWA	Indirect evidence	Malmö, SwedenHQ checked Sep 29, 2026	201-500	324 contacts →
	Indirect evidence “We believe tomorrow is today’s emerging business – rising up from untapped potential within established industries and start-ups.” Source: RevenueBase Database · checked Sep 29, 2026
20	Mewburn Ellis	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	201-500	319 contacts →
	Indirect evidence “Mewburn Ellis is the forward-looking IP firm.” Source: RevenueBase Database · checked Sep 29, 2026
21	Plasseraud IP	Indirect evidence	Paris, GermanyHQ checked Sep 29, 2026	201-500	318 contacts →
	Indirect evidence “Founded in 1906, Plasseraud IP is one of the leading European firms in the IP sector, and among the largest in France.” Source: RevenueBase Database · checked Sep 29, 2026
22	Merchant & Gould P.C	Strong evidence	Minneapolis, MN, United StatesHQ checked Sep 29, 2026	201-500	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 29, 2026
23	Banner Witcoff	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 29, 2026	201-500	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 29, 2026
24	Schwegman Lundberg & Woessner, P.A	Partial evidence	Minneapolis, MN, United StatesHQ checked Sep 29, 2026	201-500	275 contacts →
	Partial evidence “SLW is a boutique law firm dedicated to protecting intellectual property.” Source: RevenueBase Database · checked Sep 29, 2026
25	Lexorbis	Indirect evidence	New Delhi, IndiaHQ checked Sep 29, 2026	51-200	275 contacts →
	Indirect evidence “LexOrbis is a premier IP-Boutique firm based at New Delhi, India.” Source: RevenueBase Database · checked Sep 29, 2026

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: patent prosecution 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 patent prosecution law firms.
Partial evidence: Its own public description names part of patent prosecution law firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name patent prosecution 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 5,016 patent prosecution law firms worldwide

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Patent prosecution law firms worldwide at a glance

As of Sep 29, 2026

43.4%Verified-email coverage

13.0Average contacts per company

1-10Median size (employees)

1.8%Largest-city concentration · New Delhi

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

2,896

11-50

1,541

51-200

416

201-500

120

501-1,000

1,001-5,000

10001+

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 patent prosecution 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 patent prosecution law firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “patent prosecution 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 patent prosecution 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 patent prosecution 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, 28,353 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 29, 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.

Patent prosecution law firms by location

40 lists · largest first

Every Patent prosecution law firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 patent prosecution 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 patent prosecution law firms are there worldwide?

RevenueBase identified 5,016 patent prosecution 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 patent prosecution law firms?

The United States leads with 1,597 companies, followed by India (467) and Germany (402). Every patent prosecution law firms list by country and city is linked on this page.

Which city has the most patent prosecution law firms?

New Delhi leads with 92 headquartered companies, followed by Munchen (80) and New York (72).

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 28,353 verified decision-maker contacts tracked across these 5,016 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 29, 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.