Company lists · Data refreshed September 2026

Top 25 Intellectual property law companies based in the United States

As of September 2026, this directory lists 2,401 intellectual property law companies across United States, with 31,214 contacts and 16,507 email addresses. New York is the single most-represented city among the companies on the list.

Intellectual property law companies advise and represent clients on patents, trademarks, copyrights, trade secrets, licensing, and related disputes. This list covers companies that provide legal services focused on protecting, managing, licensing, or enforcing intellectual property rights. Ranked by team size, largest first. Data current as of September 7, 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 7, 2026 86% judged on-target in blind review
2,401Companies
31,214Contacts tracked
16,507Verified emails
15,389Mobile numbers
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The 25 largest intellectual property law companies based in the United States

Ranked by team size
Top 25 of 2,401 intellectual property law companies based in the United States, ranked by team size, largest first. Data refreshed Sep 7, 2026. RevenueBase Smart Search rates how each company's information relates to intellectual property law companies: 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
1Indirect evidencePalo Alto, CA, United StatesHQ checked Sep 7, 20261,001-5,0003,341 contacts →

“Clients partner with Cooley on transformative deals, complex IP and regulatory matters, and high-stakes litigation.”

Source: company website · checked Sep 7, 2026
2Strong evidenceBoston, MA, United StatesHQ checked Sep 7, 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 7, 2026
3Indirect evidenceWashington, DC, United StatesHQ checked Sep 7, 2026501-1,000936 contacts →

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

Source: company website · checked Sep 7, 2026
4Strong evidenceLos Altos, CA, United StatesHQ checked Sep 7, 2026501-1,000754 contacts →

“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 7, 2026
5Indirect evidenceIrvine, CA, United StatesHQ checked Sep 7, 2026501-1,000606 contacts →

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

Source: company website · checked Sep 7, 2026
6Partial evidenceSeattle, WA, United StatesHQ checked Sep 7, 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 7, 2026
7Strong evidenceWashington, DC, United StatesHQ checked Sep 7, 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 7, 2026
8Indirect evidenceBoston, MA, United StatesHQ checked Sep 7, 2026201-500428 contacts →

“Wolf, Greenfield & Sacks, P.C.”

Source: company website · checked Sep 7, 2026
9Strong evidenceMinneapolis, MN, United StatesHQ checked Sep 7, 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 7, 2026
10Strong evidenceChicago, IL, United StatesHQ checked Sep 7, 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 7, 2026
11Indirect evidenceKansas City, MO, United StatesHQ checked Sep 7, 2026501-1,000283 contacts →

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

Source: company website · checked Sep 7, 2026
12Strong evidenceMinneapolis, MN, United StatesHQ checked Sep 7, 2026201-500275 contacts →

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

Source: company website · checked Sep 7, 2026
13Strong evidenceBloomfield Hills, MI, United StatesHQ checked Sep 7, 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 7, 2026
14Partial evidenceLos Angeles, CA, United StatesHQ checked Sep 7, 2026201-500258 contacts →

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

Source: company website · checked Sep 7, 2026
15Indirect evidenceNew York, NY, United StatesHQ checked Sep 7, 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 7, 2026
16Strong evidenceHartford, CT, United StatesHQ checked Sep 7, 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 7, 2026
17Strong evidenceChicago, IL, United StatesHQ checked Sep 7, 202651-200213 contacts →

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

Source: company website · checked Sep 7, 2026
18Strong evidenceWashington, DC, United StatesHQ checked Sep 7, 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 7, 2026
19Partial evidenceNew York, NY, United StatesHQ checked Sep 7, 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 7, 2026
20Strong evidenceGreenville, SC, United StatesHQ checked Sep 7, 202651-200181 contacts →

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

Source: company website · checked Sep 7, 2026
21Partial evidenceDallas, TX, United StatesHQ checked Sep 7, 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 7, 2026
22Indirect evidenceRoyal Oak, MI, United StatesHQ checked Sep 7, 202651-200165 contacts →

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

Source: company website · checked Sep 7, 2026
23Strong evidenceChicago, United StatesHQ checked Sep 7, 202651-200162 contacts →

“McAndrews, Held & Malloy is a premier, full-service intellectual property and technology law firm.”

Source: company website · checked Sep 7, 2026
24Strong evidenceChicago, IL, United StatesHQ checked Sep 7, 202651-200157 contacts →

“Leydig, Voit & Mayer remains at the forefront of intellectual property law, providing advice and counsel in intellectual property litigation, licensing, and prosecution services…”

Source: company website · checked Sep 7, 2026
25Strong evidenceAlexandria, VA, United StatesHQ checked Sep 7, 2026201-500156 contacts →

“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: company website · checked Sep 7, 2026

Showing 25 of 2,401 intellectual property law companies based in the United States

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

As of Sep 7, 2026
52.9%Verified-email coverage
49.3%Mobile-number coverage
13.0Average contacts per company
1-10Median size (employees)
7.2%Largest-city concentration · New York
Sep 7, 2026Page data refreshed

Companies by employee count

1-10
1,688
11-50
546
51-200
131
201-500
20
501-1,000
10
1,001-5,000
4

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 intellectual property law companies, 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 “intellectual property law companies”. 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 intellectual property law companies), 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 intellectual property law companies, 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, 16,507 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 7, 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

How many intellectual property law companies are in the directory?

The directory includes 2,401 intellectual property law companies as of September 2026.

Where are most intellectual property law companies located?

New York is the single most-represented city among the companies on the list, which spans United States.

How can I find contacts at intellectual property law companies?

The directory includes 31,214 contacts and 16,507 email addresses associated with the listed intellectual property law companies.

Ready to reach these companies? Verified emails and direct dials for all 2,401 intellectual property law companies based in the United States. Start with a free account, no credit card.

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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.