Company lists · Data refreshed September 2026

Top 25 Patent litigation firms based in the United States

Name: Patent litigation firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 1,627 companies tracked

RevenueBase identified 1,627 patent litigation firms headquartered in the United States as of September 2026 and tracks 28,626 professional contacts across them, including 15,657 with verified work emails. New York is the largest hub.

This list covers patent litigation firms headquartered in the United States, 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.

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

1,627Companies

28,626Contacts tracked

15,657Verified emails

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The 25 largest patent litigation firms based in the United States

Ranked by team size

Top 25 of 1,627 patent litigation firms based in the United States, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to patent litigation 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	MINTZ	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,326 contacts →
	Indirect 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 20, 2026
2	Fish & Richardson P.C	Partial evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	1,001-5,000	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 20, 2026
3	Fenwick & West	Indirect evidence	Silicon Valley, CA, United StatesHQ checked Sep 20, 2026	501-1,000	1,126 contacts →
	Indirect 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 20, 2026
4	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
5	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
6	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
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	Tucker Ellis LLP	Indirect evidence	Cleveland, OH, United StatesHQ checked Sep 20, 2026	201-500	481 contacts →
	Indirect 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 20, 2026
9	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
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	Strong evidence	Minneapolis, MN, United StatesHQ checked Sep 20, 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 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	Lathrop Gage	Indirect evidence	Kansas City, MO, United StatesHQ checked Sep 20, 2026	501-1,000	283 contacts →
	Indirect evidence “Lathrop Gage clients are the backbone of our economy.” Source: RevenueBase Database · checked Sep 20, 2026
14	Schwegman Lundberg & Woessner, P.A	Indirect evidence	Minneapolis, MN, United StatesHQ checked Sep 20, 2026	201-500	275 contacts →
	Indirect evidence “SLW is a boutique law firm dedicated to protecting intellectual property.” Source: RevenueBase Database · checked Sep 20, 2026
15	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
16	Irell & Manella LLP	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 20, 2026	201-500	258 contacts →
	Partial evidence “Irell & Manella LLP is a law firm focused on complex commercial and IP litigation.” Source: RevenueBase Database · checked Sep 20, 2026
17	Keker, VAN Nest & Peters LLP	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 20, 2026	51-200	250 contacts →
	Partial evidence “Keker, Van Nest & Peters is a trial-practice litigation firm located in San Francisco.” Source: RevenueBase Database · checked Sep 20, 2026
18	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
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	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
21	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
22	Morris, Nichols, Arsht & Tunnell LLP	Partial evidence	Wilmington, DE, United StatesHQ checked Sep 20, 2026	201-500	208 contacts →
	Partial evidence “Recognized as Delaware’s premier law firm, Morris Nichols handles bet-the-company, high-stakes matters in the four key areas of corporate litigation, commercial and corporate…” Source: RevenueBase Database · checked Sep 20, 2026
23	Axinn, Veltrop & Harkrider LLP	Indirect evidence	New York, NY, United StatesHQ checked Sep 20, 2026	51-200	196 contacts →
	Indirect evidence “A firm to turn to when all seems hopeless"-Chambers USA Axinn combines the skills, experience and dedication of the world's largest firms with the focus, responsiveness…” Source: RevenueBase Database · checked Sep 20, 2026
24	Fross Zelnick Lehrman & Zissu	Indirect evidence	New York, NY, United StatesHQ checked Sep 20, 2026	51-200	182 contacts →
	Indirect evidence “Fross Zelnick is consistently recognized by clients and peers as one of the top IP law firms in the world.” Source: RevenueBase Database · checked Sep 20, 2026
25	Dority & Manning, P.A	Indirect evidence	Greenville, SC, United StatesHQ checked Sep 20, 2026	51-200	181 contacts →
	Indirect evidence “Formed in 1984, Dority & Manning is a full-service intellectual property law firm.” 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 litigation 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 litigation firms.
Partial evidence: Its own public description names part of patent litigation firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name patent litigation 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 1,627 patent litigation firms based in the United States

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Patent litigation firms based in the United States at a glance

As of Sep 20, 2026

54.7%Verified-email coverage

17.6Average contacts per company

1-10Median size (employees)

5.4%Largest-city concentration · New York

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

1,015

11-50

464

51-200

116

201-500

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 1,627 companies.

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 litigation 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.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “patent litigation 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 litigation 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 litigation firms, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
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, 15,657 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 litigation firms by metro

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 litigation 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 litigation firms are there based in the United States?

RevenueBase identified 1,627 patent litigation firms headquartered in the United States 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?

MINTZ, headquartered in Boston, tops this list with the largest team on record.

Which city has the most patent litigation firms?

New York leads with 88 headquartered companies, followed by Washington (65) and Chicago (61).

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 15,657 verified decision-maker contacts tracked across these 1,627 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.