Company lists · Data refreshed September 2026

Top 25 Patent infringement lawyers worldwide

Name: Patent infringement lawyers worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 2,674 companies tracked

RevenueBase identified 2,674 patent infringement lawyers worldwide as of September 2026 and tracks 38,184 professional contacts across them, including 17,228 with verified work emails. The United States is the largest market and New York the largest hub.

This list covers patent infringement lawyers 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 20, 2026. Country and city lists for patent infringement lawyers 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 20, 2026 86% judged on-target in blind review

2,674Companies

38,184Contacts tracked

17,228Verified emails

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The 25 largest patent infringement lawyers worldwide

Ranked by team size

Top 25 of 2,674 patent infringement lawyers worldwide, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to patent infringement lawyers: 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	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,167 contacts →
	Indirect 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 20, 2026
2	Finnegan, Henderson, Farabow, Garrett & Dunner, LLP	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 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 20, 2026
3	Maxval Group, INC	Indirect evidence	Los Altos, CA, United StatesHQ checked Sep 20, 2026	501-1,000	754 contacts →
	Indirect 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 20, 2026
4	Knobbe Martens	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 20, 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 20, 2026
5	Marks & Clerk	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	501-1,000	573 contacts →
	Indirect evidence “We’re true specialists – focusing on IP and IP alone.” Source: RevenueBase Database · checked Sep 20, 2026
6	Smart & Biggar	Indirect evidence	Ottawa, ON, CanadaHQ checked Sep 20, 2026	501-1,000	521 contacts →
	Indirect evidence “Smart & Biggar is a Canadian intellectual property law firm.” Source: RevenueBase Database · checked Sep 20, 2026
7	Sagaciouselevate	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 20, 2026	501-1,000	488 contacts →
	Indirect 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 20, 2026
8	Sterne, Kessler, Goldstein & FOX	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	201-500	468 contacts →
	Indirect 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 20, 2026
9	K&s Partners	Indirect evidence	Gurugram, IndiaHQ checked Sep 20, 2026	201-500	454 contacts →
	Indirect 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 20, 2026
10	Wolf Greenfield	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	201-500	428 contacts →
	Indirect evidence “Wolf, Greenfield & Sacks, P.C.” Source: RevenueBase Database · checked Sep 20, 2026
11	Merchant & Gould P.C	Partial evidence	Minneapolis, MN, United StatesHQ checked Sep 20, 2026	201-500	317 contacts →
	Partial 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 20, 2026
12	Banner Witcoff	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 20, 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 20, 2026
13	Harness IP	Partial evidence	Bloomfield Hills, MI, United StatesHQ checked Sep 20, 2026	201-500	266 contacts →
	Partial evidence “Harness IP’s team of patent and trademark attorneys serve clients in all areas of intellectual property law.” Source: RevenueBase Database · checked Sep 20, 2026
14	Irell & Manella LLP	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 20, 2026	201-500	258 contacts →
	Indirect evidence “Irell & Manella LLP is a law firm focused on complex commercial and IP litigation.” Source: RevenueBase Database · checked Sep 20, 2026
15	Effectual Services	Partial evidence	New York, NY, United StatesHQ checked Sep 20, 2026	201-500	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 20, 2026
16	Hoffmann Eitle	Indirect evidence	Munich, GermanyHQ checked Sep 20, 2026	201-500	241 contacts →
	Indirect evidence “HOFFMANN EITLE is one of the largest intellectual property law firms in Europe.” Source: RevenueBase Database · checked Sep 20, 2026
17	S.S. Rana & CO	Indirect evidence	New Delhi, IndiaHQ checked Sep 20, 2026	201-500	227 contacts →
	Indirect evidence “S.” Source: RevenueBase Database · checked Sep 20, 2026
18	EIP	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	201-500	223 contacts →
	Indirect evidence “EIP is a leading intellectual property law firm, trusted by businesses worldwide to turn innovation into competitive advantage.” Source: RevenueBase Database · checked Sep 20, 2026
19	Cantor Colburn LLP	Indirect evidence	Hartford, CT, United StatesHQ checked Sep 20, 2026	201-500	222 contacts →
	Indirect 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 20, 2026
20	J A Kemp	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	201-500	220 contacts →
	Partial evidence “J A Kemp is a firm packed with patent and trade mark attorneys at the top of their game, renowned for their technical excellence, human engagement and trusted advice.” Source: RevenueBase Database · checked Sep 20, 2026
21	Marshall, Gerstein & Borun LLP	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 20, 2026	51-200	213 contacts →
	Indirect evidence “Marshall, Gerstein & Borun LLP has one focus - intellectual property law.” Source: RevenueBase Database · checked Sep 20, 2026
22	Sughrue Mion Pllc	Indirect evidence	Washington, DC, United StatesHQ checked Sep 20, 2026	201-500	211 contacts →
	Indirect evidence “From Sughrue’s inception in 1957 to the present, we have focused solely on intellectual property law.” Source: RevenueBase Database · checked Sep 20, 2026
23	Ennoble IP EIP	Indirect evidence	Noida, IndiaHQ checked Sep 20, 2026	201-500	205 contacts →
	Indirect evidence “Welcome to Ennoble IP An award-winning techno legal KPO and Intellectual Property (IP) platform that allows innovators, researchers, investors, entrepreneurs, and academia to…” Source: RevenueBase Database · checked Sep 20, 2026
24	ALI & Associates	Indirect evidence	Karachi, PakistanHQ checked Sep 20, 2026	51-200	201 contacts →
	Indirect evidence “Ali & Associates is a leading Pakistani law firm with offices at Karachi, Lahore, Islamabad, and a correspondence office in Washington DC.” Source: RevenueBase Database · checked Sep 20, 2026
25	Ccpit Patent And Trademark LAW Office	Indirect evidence	Beijing, United StatesHQ checked Sep 20, 2026	201-500	199 contacts →
	Indirect evidence “Founded in 1957, we are the oldest and one of the largest full-service intellectual property law firms in China.” Source: RevenueBase Database · checked Sep 20, 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 infringement lawyers. 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 infringement lawyers.
Partial evidence: Its own public description names part of patent infringement lawyers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name patent infringement lawyers. 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 2,674 patent infringement lawyers worldwide

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Patent infringement lawyers worldwide at a glance

As of Sep 20, 2026

45.1%Verified-email coverage

14.3Average contacts per company

1-10Median size (employees)

2.3%Largest-city concentration · New York

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

1,512

11-50

836

51-200

241

201-500

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 infringement lawyers, 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 infringement lawyers are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “patent infringement lawyers”. 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 infringement lawyers), 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 infringement lawyers, 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, 17,228 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 20, 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 infringement lawyers by location

17 lists · largest first

Every Patent infringement lawyers 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 infringement lawyers, 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 infringement lawyers are there worldwide?

RevenueBase identified 2,674 patent infringement lawyers 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 infringement lawyers?

The United States leads with 1,241 companies, followed by Germany (221) and India (162). Every patent infringement lawyers list by country and city is linked on this page.

Which city has the most patent infringement lawyers?

New York leads with 62 headquartered companies, followed by Washington (54) and Chicago (49).

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 17,228 verified decision-maker contacts tracked across these 2,674 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 20, 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.