Company lists · Data refreshed September 2026

Top 25 Trademark law firms based in the United States

RevenueBase identified 2,455 trademark law firms headquartered in the United States as of September 2026 and tracks 29,310 professional contacts across them, including 15,690 with verified work emails and 15,206 with mobile numbers. New York is the largest hub.

This list covers trademark 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 6, 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 6, 2026 86% judged on-target in blind review
2,455Companies
29,310Contacts tracked
15,690Verified emails
15,206Mobile numbers
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The 25 largest trademark law firms based in the United States

Ranked by team size
Top 25 of 2,455 trademark law firms based in the United States, ranked by team size, largest first. Data refreshed Sep 6, 2026. RevenueBase Smart Search rates how each company's information relates to trademark law 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Partial evidenceBoston, MA, United StatesHQ checked Sep 6, 20261,001-5,0001,167 contacts →

“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 6, 2026
2Indirect evidenceWashington, DC, United StatesHQ checked Sep 6, 2026501-1,000936 contacts →

“When your most valuable assets are ideas, innovation, and brand-you need the best.”

Source: company website · checked Sep 6, 2026
3Partial evidenceDetroit, MI, United StatesHQ checked Sep 6, 2026501-1,000669 contacts →

“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 6, 2026
4Indirect evidenceIrvine, CA, United StatesHQ checked Sep 6, 2026501-1,000606 contacts →

“Knobbe Martens protects the ideas that drive innovation and propel our world forward.”

Source: company website · checked Sep 6, 2026
5Partial evidenceSeattle, WA, United StatesHQ checked Sep 6, 2026501-1,000488 contacts →

“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 6, 2026
6Partial evidenceWashington, DC, United StatesHQ checked Sep 6, 2026201-500468 contacts →

“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 6, 2026
7Indirect evidenceBoston, MA, United StatesHQ checked Sep 6, 2026201-500428 contacts →

“Wolf, Greenfield & Sacks, P.C.”

Source: company website · checked Sep 6, 2026
8Indirect evidenceSt Louis, MO, United StatesHQ checked Sep 6, 2026201-500387 contacts →

“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 6, 2026
9Strong evidenceMinneapolis, MN, United StatesHQ checked Sep 6, 2026201-500317 contacts →

“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 6, 2026
10Partial evidenceRoyal Oak, MI, United StatesHQ checked Sep 6, 2026201-500307 contacts →

“From our founding above a blacksmith shop in 1869 to the full-service law practice we’ve become in the 156 years since, we have consistently sought to earn each client’s trust by…”

Source: company website · checked Sep 6, 2026
11Indirect evidenceChicago, IL, United StatesHQ checked Sep 6, 2026201-500288 contacts →

“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 6, 2026
12Indirect evidenceKansas City, MO, United StatesHQ checked Sep 6, 2026501-1,000283 contacts →

“Lathrop Gage clients are the backbone of our economy.”

Source: company website · checked Sep 6, 2026
13Partial evidenceMinneapolis, MN, United StatesHQ checked Sep 6, 2026201-500275 contacts →

“SLW is a boutique law firm dedicated to protecting intellectual property.”

Source: company website · checked Sep 6, 2026
14Strong evidenceBloomfield Hills, MI, United StatesHQ checked Sep 6, 2026201-500266 contacts →

“Harness IP’s team of patent and trademark attorneys serve clients in all areas of intellectual property law.”

Source: company website · checked Sep 6, 2026
15Partial evidenceLos Angeles, CA, United StatesHQ checked Sep 6, 2026201-500258 contacts →

“Irell & Manella LLP is a law firm focused on complex commercial and IP litigation.”

Source: company website · checked Sep 6, 2026
16Indirect evidenceNew York, NY, United StatesHQ checked Sep 6, 2026201-500242 contacts →

“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 6, 2026
17Partial evidenceHartford, CT, United StatesHQ checked Sep 6, 2026201-500222 contacts →

“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 6, 2026
18Partial evidenceChicago, IL, United StatesHQ checked Sep 6, 202651-200213 contacts →

“Marshall, Gerstein & Borun LLP has one focus - intellectual property law.”

Source: company website · checked Sep 6, 2026
19Partial evidenceWashington, DC, United StatesHQ checked Sep 6, 2026201-500211 contacts →

“From Sughrue’s inception in 1957 to the present, we have focused solely on intellectual property law.”

Source: company website · checked Sep 6, 2026
20Partial evidenceNew York, NY, United StatesHQ checked Sep 6, 202651-200182 contacts →

“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 6, 2026
21Partial evidenceGreenville, SC, United StatesHQ checked Sep 6, 202651-200181 contacts →

“Formed in 1984, Dority & Manning is a full-service intellectual property law firm.”

Source: company website · checked Sep 6, 2026
22Partial evidenceDallas, TX, United StatesHQ checked Sep 6, 202651-200180 contacts →

“Munck Wilson Mandala is a technology-focused law firm with offices in Dallas, Austin, Houston, Waco, Texas; Los Angeles, California; and South Florida.”

Source: company website · checked Sep 6, 2026
23Indirect evidenceWilmington, DE, United StatesHQ checked Sep 6, 202651-200177 contacts →

“Formidable lawyers deeply committed to anticipating the needs of our clients through innovation and superior client service.”

Source: company website · checked Sep 6, 2026
24Partial evidenceLos Angeles, CA, United StatesHQ checked Sep 6, 202651-200172 contacts →

“Glaser Weil is a premier law firm headquartered in Los Angeles with outstanding experience and market-leading successes in litigation, corporate, intellectual property and real…”

Source: company website · checked Sep 6, 2026
25Indirect evidenceRoyal Oak, MI, United StatesHQ checked Sep 6, 202651-200165 contacts →

“The most effective IP solutions come from putting great minds together-yours and ours.”

Source: company website · checked Sep 6, 2026

Showing 25 of 2,455 trademark law firms based in the United States

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Trademark law firms based in the United States at a glance

As of Sep 6, 2026
53.5%Verified-email coverage
51.9%Mobile-number coverage
11.9Average contacts per company
1-10Median size (employees)
7.7%Largest-city concentration · New York
Sep 6, 2026Page data refreshed

Companies by employee count

1-10
1,748
11-50
545
51-200
128
201-500
19
501-1,000
8
1,001-5,000
3

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

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 trademark law 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 “trademark law 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 trademark law 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 trademark 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 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, 15,690 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 6, 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.

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 trademark law 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 trademark law firms are there based in the United States?

RevenueBase identified 2,455 trademark 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 trademark law firms?

New York leads with 189 headquartered companies, followed by Chicago (86) and Washington (83).

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 15,690 verified decision-maker contacts tracked across these 2,455 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 6, 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.