Company lists · Data refreshed September 2026

Top 25 Patent and intellectual property law firms worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 10,391 companies tracked

RevenueBase identified 10,391 patent and intellectual property law firms worldwide as of September 2026 and tracks 152,060 professional contacts across them, including 62,703 with verified work emails. The United States is the largest market and Paris the largest hub.

This list covers patent and intellectual property 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 and intellectual property 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

10,391Companies

152,060Contacts tracked

62,703Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest patent and intellectual property law firms worldwide

Ranked by team size

Top 25 of 10,391 patent and intellectual property 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 and intellectual property 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	Cooley LLP	Indirect evidence	Palo Alto, CA, United StatesHQ checked Sep 29, 2026	1,001-5,000	3,341 contacts →
	Indirect evidence “Clients partner with Cooley on transformative deals, complex IP and regulatory matters, and high-stakes litigation.” Source: RevenueBase Database · checked Sep 29, 2026
2	Foley & Lardner LLP	Indirect evidence	Milwaukee, WI, United StatesHQ checked Sep 29, 2026	1,001-5,000	2,884 contacts →
	Indirect evidence “Foley & Lardner LLP stands at the nexus of the Energy & Infrastructure, Health Care & Life Sciences, Innovative Technology, and Manufacturing Sectors.” Source: RevenueBase Database · checked Sep 29, 2026
3	Perkins Coie	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 29, 2026	1,001-5,000	2,746 contacts →
	Indirect evidence “Perkins Coie has combined with Ashurst to form Ashurst Perkins Coie.” Source: RevenueBase Database · checked Sep 29, 2026
4	Venable LLP	Partial evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,790 contacts →
	Partial evidence “Committed to Your Success – As a law firm of more than 900 professionals, Venable delivers legal services globally in every area of regulatory compliance, government affairs…” Source: RevenueBase Database · checked Sep 29, 2026
5	Crowell & Moring	Partial evidence	Washington, DC, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,602 contacts →
	Partial evidence “Crowell & Moring is an international law firm with operations in the United States, Europe, MENA, and Asia.” Source: RevenueBase Database · checked Sep 29, 2026
6	Kilpatrick Townsend & Stockton LLP	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,558 contacts →
	Indirect evidence “Kilpatrick is trusted counsel to the world’s most innovative companies.” Source: RevenueBase Database · checked Sep 29, 2026
7	MINTZ	Partial evidence	Boston, MA, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,326 contacts →
	Partial evidence “Mintz is a full-service law firm serving clients in the life sciences, energy, private equity, and technology industries.” Source: RevenueBase Database · checked Sep 29, 2026
8	CPA Global	Indirect evidence	St Helier, JerseyHQ checked Sep 29, 2026	1,001-5,000	1,171 contacts →
	Indirect evidence “CPA Global makes it possible for IP to move at the speed of ideas.” Source: RevenueBase Database · checked Sep 29, 2026
9	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
10	Fenwick & West	Partial evidence	Silicon Valley, CA, United StatesHQ checked Sep 29, 2026	501-1,000	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 29, 2026
11	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
12	Adams & Adams	Indirect evidence	Pretoria, South AfricaHQ checked Sep 29, 2026	501-1,000	846 contacts →
	Indirect evidence “Realise African Enterprise.” Source: RevenueBase Database · checked Sep 29, 2026
13	Dannemann Siemsen	Strong evidence	Rio De Janeiro, BrazilHQ checked Sep 29, 2026	501-1,000	775 contacts →
	Strong evidence “Dannemann Siemsen is a Brazilian firm dedicated to Intellectual Property since 1900.” Source: RevenueBase Database · checked Sep 29, 2026
14	Maxval Group, INC	Strong evidence	Los Altos, CA, United StatesHQ checked Sep 29, 2026	501-1,000	754 contacts →
	Strong evidence “Since 2004, MaxVal has helped the world's most innovative organizations capitalize on their intellectual property by being different from the legacy IP solution providers.” Source: RevenueBase Database · checked Sep 29, 2026
15	Dennemeyer	Strong evidence	Howald, LuxembourgHQ checked Sep 29, 2026	1,001-5,000	707 contacts →
	Strong evidence “The Dennemeyer Group offers high-quality services for the protection and management of Intellectual Property rights and is committed to being the first-choice partner for…” Source: RevenueBase Database · checked Sep 29, 2026
16	Butler Snow LLP	Indirect evidence	Ridgeland, MS, United StatesHQ checked Sep 29, 2026	501-1,000	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 29, 2026
17	Honigman LLP	Partial evidence	Detroit, MI, United StatesHQ checked Sep 29, 2026	501-1,000	669 contacts →
	Partial evidence “Honigman LLP is an Am Law 200 full-service, general business law firm with more than 400 attorneys counseling clients on complex issues across the country in Chicago, Michigan…” Source: RevenueBase Database · checked Sep 29, 2026
18	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
19	Goldfarb Gross Seligman	Partial evidence	Tel Aviv, IsraelHQ checked Sep 29, 2026	501-1,000	585 contacts →
	Partial evidence “Goldfarb Gross Seligman & Co,one of the largest law firms in Israel, is among the elite group of firms that deliver top-tier legal services at international standards.” Source: RevenueBase Database · checked Sep 29, 2026
20	ROUSE	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	501-1,000	584 contacts →
	Strong 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
21	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
22	Eckert Seamans	Indirect evidence	Pittsburgh, PA, United StatesHQ checked Sep 29, 2026	501-1,000	570 contacts →
	Indirect evidence “Eckert Seamans Cherin & Mellott LLC has lawyers in offices throughout the United States, including Harrisburg, Philadelphia, and Pittsburgh, Pennsylvania; Boston, Massachusetts…” Source: RevenueBase Database · checked Sep 29, 2026
23	HGF Limited	Strong evidence	Leeds, United KingdomHQ checked Sep 29, 2026	201-500	538 contacts →
	Strong evidence “HGF is one of Europe’s largest firms of Intellectual Property specialists.” Source: RevenueBase Database · checked Sep 29, 2026
24	Smart & Biggar	Strong evidence	Ottawa, ON, CanadaHQ checked Sep 29, 2026	501-1,000	521 contacts →
	Strong evidence “Smart & Biggar is a Canadian intellectual property law firm.” Source: RevenueBase Database · checked Sep 29, 2026
25	Sagaciouselevate	Partial evidence	Seattle, WA, United StatesHQ checked Sep 29, 2026	501-1,000	488 contacts →
	Partial evidence “Sagacious IP is the World’s LARGEST IP research firm that reliably supports the worldwide IP community including Large Corporations, Small & Mid-size Corporations, IP law firms…” 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 and intellectual property 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 and intellectual property law firms.
Partial evidence: Its own public description names part of patent and intellectual property 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 and intellectual property 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 10,391 patent and intellectual property law firms worldwide

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 62,703 reachable decision-makers.

Free signup · no credit card

View the full list →

Patent and intellectual property law firms worldwide at a glance

As of Sep 29, 2026

41.2%Verified-email coverage

14.6Average contacts per company

1-10Median size (employees)

1.9%Largest-city concentration · Paris

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

6,580

11-50

2,840

51-200

673

201-500

198

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 and intellectual property 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 and intellectual property law firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “patent and intellectual property 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 and intellectual property 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 and intellectual property 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, 62,703 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 and intellectual property law firms by location

85 lists · largest first

Every Patent and intellectual property 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 and intellectual property 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 and intellectual property law firms are there worldwide?

RevenueBase identified 10,391 patent and intellectual property 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?

Cooley LLP, headquartered in Palo Alto, tops this list with the largest team on record.

Which country has the most patent and intellectual property law firms?

The United States leads with 2,801 companies, followed by India (929) and Germany (532). Every patent and intellectual property law firms list by country and city is linked on this page.

Which city has the most patent and intellectual property law firms?

Paris leads with 198 headquartered companies, followed by New York (196) and New Delhi (193).

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 62,703 verified decision-maker contacts tracked across these 10,391 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.

Ready to reach these companies? Verified emails and direct dials for all 10,391 patent and intellectual property law firms worldwide. Start with a free account, no credit card.

Download this list →

Related lists

Browse the directory

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.