Company lists · Data refreshed September 2026
Top 25 Patent law firms based in the United States
RevenueBase identified 2,151 patent law firms headquartered in the United States as of September 2026 and tracks 30,960 professional contacts across them, including 16,699 with verified work emails and 15,980 with mobile numbers. New York is the largest hub.
This list covers patent 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 5, 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.
The 25 largest patent law firms based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,167 | ||||
“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 5, 2026Thanks. The Data Team will review it. | |||||
| 2 | 936 | ||||
“When your most valuable assets are ideas, innovation, and brand-you need the best.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 3 | 754 | ||||
“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 5, 2026Thanks. The Data Team will review it. | |||||
| 4 | 685 | ||||
“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 5, 2026Thanks. The Data Team will review it. | |||||
| 5 | 669 | ||||
“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 5, 2026Thanks. The Data Team will review it. | |||||
| 6 | 606 | ||||
“Knobbe Martens protects the ideas that drive innovation and propel our world forward.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 7 | 488 | ||||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 8 | 481 | ||||
“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 5, 2026Thanks. The Data Team will review it. | |||||
| 9 | 468 | ||||
“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 5, 2026Thanks. The Data Team will review it. | |||||
| 10 | 428 | ||||
“Wolf, Greenfield & Sacks, P.C.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 11 | 387 | ||||
“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 5, 2026Thanks. The Data Team will review it. | |||||
| 12 | Wiggin And Dana LLPPartial evidence | 366 | |||
“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 5, 2026Thanks. The Data Team will review it. | |||||
| 13 | 319 | ||||
“Bremer Whyte Brown & O’Meara, LLP (“Bremer Whyte”) is an AV-rated firm that provides a full range of transaction and litigation services to businesses and individuals.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 14 | 317 | ||||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 15 | 288 | ||||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 16 | 283 | ||||
“Lathrop Gage clients are the backbone of our economy.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 17 | 275 | ||||
“SLW is a boutique law firm dedicated to protecting intellectual property.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 18 | 266 | ||||
“Harness IP’s team of patent and trademark attorneys serve clients in all areas of intellectual property law.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 19 | 258 | ||||
“Irell & Manella LLP is a law firm focused on complex commercial and IP litigation.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 20 | Effectual ServicesPartial evidence | 242 | |||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 21 | 222 | ||||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 22 | 213 | ||||
“Marshall, Gerstein & Borun LLP has one focus - intellectual property law.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 23 | Sughrue Mion PllcPartial evidence | 211 | |||
“From Sughrue’s inception in 1957 to the present, we have focused solely on intellectual property law.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 24 | 182 | ||||
“Fross Zelnick is consistently recognized by clients and peers as one of the top IP law firms in the world.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 25 | 181 | ||||
“Formed in 1984, Dority & Manning is a full-service intellectual property law firm.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 2,151 patent law firms based in the United States
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Patent law firms based in the United States at a glance
As of Sep 5, 2026Companies by employee count
Verified emails by last verification
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 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 “patent 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 patent 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, 16,699 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 5, 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 law firms by metro
- Patent law firms in New York114
- Patent law firms in Washington82
- Patent law firms in Chicago72
- Patent law firms in Los Angeles55
- Patent law firms in Houston52
- Patent law firms in Dallas50
- Patent law firms in Atlanta45
- Patent law firms in Austin43
- Patent law firms in San Diego38
- Patent law firms in San Francisco35
- Patent law firms in Irvine32
- Patent law firms in Seattle30
- Patent law firms in Alexandria29
- Patent law firms in Minneapolis29
- Patent law firms in Boston27
- Patent law firms in Miami26
Frequently asked
How many patent law firms are there based in the United States?
RevenueBase identified 2,151 patent 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?
Fish & Richardson P.C, headquartered in Boston, tops this list with the largest team on record.
Which city has the most patent law firms?
New York leads with 114 headquartered companies, followed by Washington (82) and Chicago (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 16,699 verified decision-maker contacts tracked across these 2,151 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 5, 2026.
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Patent law firms by geography
- Patent law firms based in Germany
- Patent law firms based in Brazil
- Patent law firms based in France
- Patent law firms based in the United Kingdom
- Patent law firms based in Italy
- Patent law firms based in Canada
- Patent law firms based in Mexico
- Patent law firms based in Spain
- Patent law firms based in Australia
- Patent law firms based in the Netherlands
- Patent law firms based in Poland
- Patent law firms based in Israel
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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.