Company lists · Data refreshed September 2026
Top 25 Environmental patent law firms based in the United States
RevenueBase identified 1,246 environmental patent law firms headquartered in the United States as of September 2026 and tracks 22,830 professional contacts across them, including 12,860 with verified work emails. Washington is the largest hub.
This list covers environmental 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 28, 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.
The 25 largest environmental patent law firms based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,326 contacts → | ||||
Partial evidence “Mintz is a full-service law firm serving clients in the life sciences, energy, private equity, and technology industries.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 2 | 1,167 contacts → | ||||
Partial 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 28, 2026Thanks. The Data Team will review it. | |||||
| 3 | 936 contacts → | ||||
Indirect evidence “When your most valuable assets are ideas, innovation, and brand-you need the best.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 4 | 606 contacts → | ||||
Indirect evidence “Knobbe Martens protects the ideas that drive innovation and propel our world forward.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 5 | 468 contacts → | ||||
Partial 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 28, 2026Thanks. The Data Team will review it. | |||||
| 6 | 428 contacts → | ||||
Indirect evidence “Wolf, Greenfield & Sacks, P.C.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 7 | 330 contacts → | ||||
Strong evidence “Jackson Kelly PLLC is a national law firm representing leading global corporations, national companies, entrepreneurs and individuals in areas of law such as environmental…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 8 | 328 contacts → | ||||
Indirect evidence “Beveridge & Diamond’s 170+ lawyers in 7 U.S.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 9 | 317 contacts → | ||||
Strong 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 28, 2026Thanks. The Data Team will review it. | |||||
| 10 | 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 28, 2026Thanks. The Data Team will review it. | |||||
| 11 | 283 contacts → | ||||
Indirect evidence “Lathrop Gage clients are the backbone of our economy.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 12 | 266 contacts → | ||||
Strong evidence “Harness IP’s team of patent and trademark attorneys serve clients in all areas of intellectual property law.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 13 | 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 28, 2026Thanks. The Data Team will review it. | |||||
| 14 | 230 contacts → | ||||
Partial evidence “Keller and Heckman, founded in 1962, has a broad practice in the areas of regulatory law, public policy, and litigation, serving both domestic and international clients.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 15 | 222 contacts → | ||||
Partial 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 28, 2026Thanks. The Data Team will review it. | |||||
| 16 | 213 contacts → | ||||
Partial evidence “Marshall, Gerstein & Borun LLP has one focus - intellectual property law.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 17 | 211 contacts → | ||||
Partial evidence “From Sughrue’s inception in 1957 to the present, we have focused solely on intellectual property law.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 18 | 204 contacts → | ||||
Partial evidence “Musick Peeler, a premier law firm with over 80 attorneys across five offices in major commercial centers of California, exemplifies excellence in legal service.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 19 | 200 contacts → | ||||
Partial evidence “Forman Watkins & Krutz LLP is one of the nation's most respected trial law firms, representing prominent corporate clients in multi-district tort claims as well as other…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 20 | 174 contacts → | ||||
Strong evidence “Van Ness Feldman is a nationally recognized mid-sized law firm specializing in the areas of energy, environment, and natural resources law and policy, with offices in Washington…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 21 | 164 contacts → | ||||
Indirect evidence “Nationally recognized for client service, Chambliss has provided legal counsel locally, regionally, and nationally for over 135 years.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 22 | 162 contacts → | ||||
Partial evidence “McAndrews, Held & Malloy is a premier, full-service intellectual property and technology law firm.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 23 | 161 contacts → | ||||
Partial evidence “Carter Ledyard & Milburn LLP is a general practice law firm headquartered in New York City’s Financial district since 1854.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 24 | 160 contacts → | ||||
Indirect evidence “For almost 100 years, McGinnis Lochridge has served to protect the interests of our clients in continuously changing landscapes including cutting-edge technology, oil and gas…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 25 | 157 contacts → | ||||
Partial 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 28, 2026Thanks. The Data Team will review it. | |||||
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: environmental patent law 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 environmental patent law firms.
- Partial evidence
- Its own public description names part of environmental patent law firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name environmental patent law 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 environmental patent law firms based in the United States
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Environmental patent law firms based in the United States at a glance
As of Sep 28, 2026Companies by employee count
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 environmental patent 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 “environmental patent 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 environmental patent 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 environmental 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 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, 12,860 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 28, 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.
Environmental patent law firms by metro
- Environmental patent law firms in Washington57
- Environmental patent law firms in New York49
- Environmental patent law firms in Austin40
- Environmental patent law firms in Chicago36
- Environmental patent law firms in Houston36
- Environmental patent law firms in Dallas26
- Environmental patent law firms in Los Angeles26
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 environmental patent 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 environmental patent law firms are there based in the United States?
RevenueBase identified 1,246 environmental 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?
MINTZ, headquartered in Boston, tops this list with the largest team on record.
Which city has the most environmental patent law firms?
Washington leads with 57 headquartered companies, followed by New York (49) and Austin (40).
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 12,860 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 28, 2026.
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Environmental patent law firms by geography
- Environmental patent law firms based in Sao Paulo, Brazil
- Environmental patent law firms based in Paris, France
- Environmental patent law firms based in Munich, Germany
- Environmental patent law firms based in Austin, United States
- Environmental patent law firms based in Chicago, United States
- Environmental patent law firms based in Dallas, United States
- Environmental patent law firms based in Houston, United States
- Environmental patent law firms based in Los Angeles, United States
- Environmental patent law firms based in New York, United States
- Environmental patent law firms based in Washington, United States
- Environmental patent law firms based in Australia
- Environmental patent law firms based in Brazil
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.
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- Environmental patent law firms based in Sao Paulo, Brazil
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- Environmental patent law firms based in Chicago, United States
- Environmental patent law firms based in Dallas, United States