Company lists · Data refreshed September 2026

Top 25 Pharmaceutical patent firms based in the United States

Name: Pharmaceutical patent 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 17, 2026 1,246 companies tracked

RevenueBase identified 1,246 pharmaceutical patent firms headquartered in the United States as of September 2026 and tracks 19,780 professional contacts across them, including 10,859 with verified work emails. New York is the largest hub.

This list covers pharmaceutical patent 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 17, 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 17, 2026 86% judged on-target in blind review

1,246Companies

19,780Contacts tracked

10,859Verified emails

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The 25 largest pharmaceutical patent firms based in the United States

Ranked by team size

Top 25 of 1,246 pharmaceutical patent firms based in the United States, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to pharmaceutical patent 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	Fish & Richardson P.C	Indirect evidence	Boston, MA, United StatesHQ checked Sep 17, 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 17, 2026
2	Finnegan, Henderson, Farabow, Garrett & Dunner, LLP	Indirect evidence	Washington, DC, United StatesHQ checked Sep 17, 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 17, 2026
3	Maxval Group, INC	Indirect evidence	Los Altos, CA, United StatesHQ checked Sep 17, 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 17, 2026
4	Knobbe Martens	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 17, 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 17, 2026
5	Sterne, Kessler, Goldstein & FOX	Indirect evidence	Washington, DC, United StatesHQ checked Sep 17, 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 17, 2026
6	Wolf Greenfield	Indirect evidence	Boston, MA, United StatesHQ checked Sep 17, 2026	201-500	428 contacts →
	Indirect evidence “Wolf, Greenfield & Sacks, P.C.” Source: RevenueBase Database · checked Sep 17, 2026
7	Merchant & Gould P.C	Partial evidence	Minneapolis, MN, United StatesHQ checked Sep 17, 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 17, 2026
8	Banner Witcoff	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 17, 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 17, 2026
9	Schwegman Lundberg & Woessner, P.A	Indirect evidence	Minneapolis, MN, United StatesHQ checked Sep 17, 2026	201-500	275 contacts →
	Indirect evidence “SLW is a boutique law firm dedicated to protecting intellectual property.” Source: RevenueBase Database · checked Sep 17, 2026
10	Harness IP	Partial evidence	Bloomfield Hills, MI, United StatesHQ checked Sep 17, 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 17, 2026
11	Effectual Services	Partial evidence	New York, NY, United StatesHQ checked Sep 17, 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 17, 2026
12	Cantor Colburn LLP	Indirect evidence	Hartford, CT, United StatesHQ checked Sep 17, 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 17, 2026
13	Marshall, Gerstein & Borun LLP	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 17, 2026	51-200	213 contacts →
	Indirect evidence “Marshall, Gerstein & Borun LLP has one focus - intellectual property law.” Source: RevenueBase Database · checked Sep 17, 2026
14	Sughrue Mion Pllc	Indirect evidence	Washington, DC, United StatesHQ checked Sep 17, 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 17, 2026
15	Fross Zelnick Lehrman & Zissu	Indirect evidence	New York, NY, United StatesHQ checked Sep 17, 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 17, 2026
16	Dority & Manning, P.A	Indirect evidence	Greenville, SC, United StatesHQ checked Sep 17, 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 17, 2026
17	Mcandrews, Held & Malloy, LTD	Indirect evidence	Chicago, United StatesHQ checked Sep 17, 2026	51-200	162 contacts →
	Indirect evidence “McAndrews, Held & Malloy is a premier, full-service intellectual property and technology law firm.” Source: RevenueBase Database · checked Sep 17, 2026
18	Leydig, Voit & Mayer, LTD	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 17, 2026	51-200	157 contacts →
	Indirect evidence “Leydig, Voit & Mayer remains at the forefront of intellectual property law, providing advice and counsel in intellectual property litigation, licensing, and prosecution services…” Source: RevenueBase Database · checked Sep 17, 2026
19	OBLON	Indirect evidence	Alexandria, VA, United StatesHQ checked Sep 17, 2026	201-500	156 contacts →
	Indirect evidence “Companies across the world depend on Oblon to help them establish, leverage and protect their intellectual property assets in the United States and abroad.” Source: RevenueBase Database · checked Sep 17, 2026
20	Workman Nydegger	Indirect evidence	Salt Lake City, UT, United StatesHQ checked Sep 17, 2026	51-200	153 contacts →
	Indirect evidence “Founded over 40 years ago, Workman Nydegger specializes in intellectual property (IP) law and complex litigation.” Source: RevenueBase Database · checked Sep 17, 2026
21	Lerner David	Indirect evidence	Cranford Township, NJ, United StatesHQ checked Sep 17, 2026	51-200	151 contacts →
	Indirect evidence “Lerner David works with clients to build and protect their Intellectual Property (IP) assets, as well as minimize risk from competitors.” Source: RevenueBase Database · checked Sep 17, 2026
22	Klarquist Sparkman, LLP	Indirect evidence	Portland, OR, United StatesHQ checked Sep 17, 2026	51-200	146 contacts →
	Indirect evidence “Klarquist is one of the oldest and largest full-service intellectual property firms in the Pacific Northwest.” Source: RevenueBase Database · checked Sep 17, 2026
23	Mbhb Mcdonnell Boehnen Hulbert & Berghoff LLP	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 17, 2026	51-200	143 contacts →
	Indirect evidence “At MBHB, the legal and scientific credentials of our professionals are first rate.” Source: RevenueBase Database · checked Sep 17, 2026
24	Cardinal Intellectual Property	Partial evidence	Evanston, IL, United StatesHQ checked Sep 17, 2026	201-500	142 contacts →
	Partial evidence “Cardinal IP is a global leader in patent and trademark research, and a provider of software services for intellectual property management.” Source: RevenueBase Database · checked Sep 17, 2026
25	Desmarais LLP	Indirect evidence	New York, NY, United StatesHQ checked Sep 17, 2026	51-200	140 contacts →
	Indirect evidence “Desmarais LLP is a leading intellectual property litigation firm with offices in New York, San Francisco, and Washington, D.C.” Source: RevenueBase Database · checked Sep 17, 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: pharmaceutical patent 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 pharmaceutical patent firms.
Partial evidence: Its own public description names part of pharmaceutical patent firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name pharmaceutical patent 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 1,246 pharmaceutical patent firms based in the United States

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Pharmaceutical patent firms based in the United States at a glance

As of Sep 17, 2026

54.9%Verified-email coverage

15.9Average contacts per company

1-10Median size (employees)

5.1%Largest-city concentration · New York

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

767

11-50

362

51-200

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 1,246 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 pharmaceutical patent 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 “pharmaceutical patent 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 pharmaceutical patent 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 pharmaceutical patent 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, 10,859 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 17, 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.

Pharmaceutical patent 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 pharmaceutical patent 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 pharmaceutical patent firms are there based in the United States?

RevenueBase identified 1,246 pharmaceutical patent 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 pharmaceutical patent firms?

New York leads with 64 headquartered companies, followed by Washington (55) and Chicago (45).

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 10,859 verified decision-maker contacts tracked across these 1,246 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 17, 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.