Company lists · Data refreshed September 2026

Top 25 Intellectual property law firms based in the United States

Name: Intellectual property law 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 4, 2026 3,577 companies tracked

RevenueBase identified 3,577 intellectual property law firms headquartered in the United States as of September 2026 and tracks 64,742 professional contacts across them, including 37,312 with verified work emails and 34,396 with mobile numbers. New York is the largest hub.

This list covers intellectual property law 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, how directly it supports the match, and when it was last checked. Data refreshed September 4, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 Match evidence on every row Refreshed Sep 4, 2026 86% judged on-target in blind review

3,577Companies

64,742Contacts tracked

37,312Verified emails

34,396Mobile numbers

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The 25 largest intellectual property law firms based in the United States

Ranked by team size

Top 25 of 3,577 intellectual property law firms based in the United States, ranked by team size, largest first. Data refreshed Sep 4, 2026. Evidence rates how directly each company's own description names intellectual property law firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	Cooley LLPIndirect evidence	Palo Alto, CA, United StatesHQ checked Sep 4, 2026	1,001-5,000	3,314
	“Clients partner with Cooley on transformative deals, complex IP and regulatory matters, and high-stakes litigation.” Source: company website · checked Sep 4, 2026
2	Foley & Lardner LLPIndirect evidence	Milwaukee, MA, United StatesHQ checked Sep 4, 2026	1,001-5,000	2,894
	“Foley & Lardner LLP stands at the nexus of the Energy & Infrastructure, Health Care & Life Sciences, Innovative Technology, and Manufacturing Sectors.” Source: company website · checked Sep 4, 2026
3	Perkins CoieIndirect evidence	Seattle, WI, United StatesHQ checked Sep 4, 2026	1,001-5,000	2,734
	“Perkins Coie has combined with Ashurst to form Ashurst Perkins Coie.” Source: company website · checked Sep 4, 2026
4	Venable LLPPartial evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	1,001-5,000	1,791
	“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: company website · checked Sep 4, 2026
5	Crowell & MoringPartial evidence	Washington, IL, United StatesHQ checked Sep 4, 2026	1,001-5,000	1,626
	“Crowell & Moring is an international law firm with operations in the United States, Europe, MENA, and Asia.” Source: company website · checked Sep 4, 2026
6	Kilpatrick Townsend & Stockton LLPIndirect evidence	Atlanta, CA, United StatesHQ checked Sep 4, 2026	1,001-5,000	1,568
	“Kilpatrick is trusted counsel to the world’s most innovative companies.” Source: company website · checked Sep 4, 2026
7	Fish & Richardson P.CStrong evidence	Boston, TX, United StatesHQ checked Sep 4, 2026	1,001-5,000	1,534
	“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: company website · checked Sep 4, 2026
8	MINTZPartial evidence	Boston, United StatesHQ checked Sep 4, 2026	1,001-5,000	1,318
	“Mintz is a full-service law firm serving clients in the life sciences, energy, private equity, and technology industries.” Source: company website · checked Sep 4, 2026
9	Fenwick & WestPartial evidence	Silicon Valley, CA, United StatesHQ checked Sep 4, 2026	501-1,000	1,138
	“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: company website · checked Sep 4, 2026
10	Finnegan, Henderson, Farabow, Garrett & Dunner, LLPIndirect evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	501-1,000	942
	“When your most valuable assets are ideas, innovation, and brand-you need the best.” Source: company website · checked Sep 4, 2026
11	Maxval Group, INCStrong evidence	Los Altos, CA, United StatesHQ checked Sep 4, 2026	501-1,000	757
	“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: company website · checked Sep 4, 2026
12	Butler Snow LLPIndirect evidence	Ridgeland, TN, United StatesHQ checked Sep 4, 2026	501-1,000	692
	“With over 400 attorneys in offices in Albuquerque, Ambler (PA), Atlanta, Austin, Baton Rouge, Bethlehem (PA), Birmingham, Boston, Charleston, Dallas, Denver, Gulfport, Huntsville…” Source: company website · checked Sep 4, 2026
13	FennemoreIndirect evidence	Phoenix, TX, United StatesHQ checked Sep 4, 2026	501-1,000	677
	“Since 1885, Fennemore has provided legal counsel to help clients thrive in a complex, evolving business and legal landscape.” Source: company website · checked Sep 4, 2026
14	Honigman LLPPartial evidence	Detroit, MI, United StatesHQ checked Sep 4, 2026	501-1,000	666
	“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: company website · checked Sep 4, 2026
15	Knobbe MartensIndirect evidence	Irvine, CA, United StatesHQ checked Sep 4, 2026	501-1,000	618
	“Knobbe Martens protects the ideas that drive innovation and propel our world forward.” Source: company website · checked Sep 4, 2026
16	Eckert SeamansIndirect evidence	Pittsburgh, MA, United StatesHQ checked Sep 4, 2026	501-1,000	567
	“Eckert Seamans Cherin & Mellott LLC has lawyers in offices throughout the United States, including Harrisburg, Philadelphia, and Pittsburgh, Pennsylvania; Boston, Massachusetts…” Source: company website · checked Sep 4, 2026
17	Tucker Ellis LLPPartial evidence	Cleveland, IL, United StatesHQ checked Sep 4, 2026	201-500	480
	“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: company website · checked Sep 4, 2026
18	Sterne, Kessler, Goldstein & FOXStrong evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	201-500	474
	“Sterne, Kessler, Goldstein & Fox is a full-service intellectual property law firm that provides innovative solutions tailored to your business and industry.” Source: company website · checked Sep 4, 2026
19	Wolf GreenfieldIndirect evidence	Boston, NY, United StatesHQ checked Sep 4, 2026	201-500	432
	“Wolf, Greenfield & Sacks, P.C.” Source: company website · checked Sep 4, 2026
20	Phillips Lytle LLPPartial evidence	Buffalo, NY, United StatesHQ checked Sep 4, 2026	201-500	396
	“We are a preeminent law firm that provides the highest level of client service.” Source: company website · checked Sep 4, 2026
21	Sandberg PhoenixIndirect evidence	St Louis, FL, United StatesHQ checked Sep 4, 2026	201-500	389
	“Over 45 years providing superior legal services to clients of every size throughout the Midwest and across the country, Sandberg Phoenix is consistently rated as one of St.” Source: company website · checked Sep 4, 2026
22	Wiggin And Dana LLPPartial evidence	New Haven, CT, United StatesHQ checked Sep 4, 2026	201-500	361
	“Wiggin and Dana is a full-service law firm of highly talented, creative and experienced lawyers dedicated to exceeding our clients’ expectations every day.” Source: company website · checked Sep 4, 2026
23	Kirton McconkieStrong evidence	Salt Lake City, UT, United StatesHQ checked Sep 4, 2026	201-500	358
	“Kirton McConkie is Utah’s premier full-service law firm with five locations and more than 200 award-winning attorneys who successfully represent clients in intellectual property…” Source: company website · checked Sep 4, 2026
24	Hahn Loeser & Parks LLPPartial evidence	Cleveland, FL, United StatesHQ checked Sep 4, 2026	201-500	352
	“Founded in 1920, Hahn Loeser & Parks LLP is a full-service law firm with offices in Cleveland and Columbus, Ohio; Naples, Fort Myers, Sarasota, Tampa and Orlando, Florida; San…” Source: company website · checked Sep 4, 2026
25	VON Briesen & Roper, S.CIndirect evidence	Milwaukee, WI, United StatesHQ checked Sep 4, 2026	201-500	326
	Source: company website · checked Sep 4, 2026

Showing 25 of 3,577 intellectual property law firms based in the United States

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Intellectual property law firms based in the United States at a glance

As of Sep 4, 2026

1-10Median size (employees)

New YorkLargest hub · 276 HQs

34,396Contacts with mobile numbers

Sep 4, 2026Data refreshed

Companies by employee count

1-10

2,502

11-50

792

51-200

204

201-500

501-1,000

1,001-5,000

Verified emails by last verification

0–30

31–60

3,283

61–90

19,948

90–180

13,898

180+

183

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 intellectual property law firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 “intellectual property law firms”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among intellectual property law 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 an evidence 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, 37,312 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 4, 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.

Intellectual property law firms by metro

Frequently asked

How many intellectual property law firms are there based in the United States?

RevenueBase identified 3,577 intellectual property law 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?

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

Which city has the most intellectual property law firms?

New York leads with 276 headquartered companies, followed by Chicago (121) and Washington (117).

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 37,312 verified decision-maker contacts tracked across these 3,577 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 4, 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 SmartSearch, 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.