Company lists · Data refreshed September 2026

Top 25 Patent attorneys based in New York, United States

Name: Patent attorneys based in New York, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 83 companies tracked

RevenueBase identified 83 patent attorneys headquartered in New York, United States as of September 2026 and tracks 1,580 professional contacts across them, including 707 with verified work emails. New York is the largest hub.

This list covers patent attorneys headquartered in New York, 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 21, 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 21, 2026 86% judged on-target in blind review

83Companies

1,580Contacts tracked

707Verified emails

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The 25 largest patent attorneys based in New York, United States

Ranked by team size

Top 25 of 83 patent attorneys based in New York, United States, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to patent attorneys: 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	Effectual Services	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 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 21, 2026
2	Fross Zelnick Lehrman & Zissu	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 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 21, 2026
3	Desmarais LLP	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 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 21, 2026
4	Ladas & Parry LLP	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	51-200	135 contacts →
	Indirect evidence “As an enterprise grows, its need for intellectual property (IP) protection expands.” Source: RevenueBase Database · checked Sep 21, 2026
5	Kenyon & Kenyon LLP	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	n/a	117 contacts →
	Indirect evidence “Kenyon & Kenyon LLP is a leading intellectual property law firm whose sophisticated and business-oriented approach helps clients succeed with their intellectual property…” Source: RevenueBase Database · checked Sep 21, 2026
6	HG LAW LLP	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	51-200	100 contacts →
	Partial evidence “HG Law LLP (formerly Haley Guiliano LLP) is an international intellectual property law firm specializing in patent law from offices in London, New York and Silicon Valley.” Source: RevenueBase Database · checked Sep 21, 2026
7	Amster Rothstein & Ebenstein LLP	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	51-200	85 contacts →
	Indirect evidence “Since 1953, Amster, Rothstein & Ebenstein LLP has focused exclusively on representing clients in all facets of intellectual property law both domestically and internationally.” Source: RevenueBase Database · checked Sep 21, 2026
8	Haug Partners LLP	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	51-200	81 contacts →
	Indirect evidence “For over 25 years, Haug Partners has provided synthesized multidisciplinary legal services for life science and technology businesses.” Source: RevenueBase Database · checked Sep 21, 2026
9	Gottlieb, Rackman & Reisman, P.C	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	34 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
10	Lucas & Mercanti LLP	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	28 contacts →
	Indirect evidence “Lucas & Mercanti is an intellectual property law firm.” Source: RevenueBase Database · checked Sep 21, 2026
11	Ostrolenk Faber LLP	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	51-200	26 contacts →
	Indirect evidence “Ostrolenk Faber is a premier intellectual property boutique law firm.” Source: RevenueBase Database · checked Sep 21, 2026
12	Epstein Drangel LLP	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	23 contacts →
	Indirect evidence “Epstein Drangel LLP is a leading intellectual property law firm.” Source: RevenueBase Database · checked Sep 21, 2026
13	Gemini LAW LLP	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1-10	21 contacts →
	Indirect evidence “Gemini’s life sciences lawyers are among the most experienced and successful at helping manufacturers of biopharma products navigate IP barriers to access the U.S.” Source: RevenueBase Database · checked Sep 21, 2026
14	Notaro, Michalos & Zaccaria P.C	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	21 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
15	Gish Pllc	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	17 contacts →
	Indirect evidence “Large publicly traded companies and cutting-edge startups trust Gish PLLC to handle their most intricate IP matters.” Source: RevenueBase Database · checked Sep 21, 2026
16	Handal & Morofsky, LLC	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	14 contacts →
	Indirect evidence “Handal & Morofsky, LLC is a boutique law firm focusing on intellectual property and internet law.” Source: RevenueBase Database · checked Sep 21, 2026
17	FAY Kaplun & Marcin, LLP	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	12 contacts →
	Partial evidence “Fay Kaplun & Marcin, LLP specializes in Intellectual Property (IP) Law, assisting clients with identifying, analyzing and protecting IP, including patents, trademarks, copyrights…” Source: RevenueBase Database · checked Sep 21, 2026
18	Lombard Geliebter & Cohen	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	9 contacts →
	Indirect evidence “LGC is a New York City-based boutique law firm specializing in intellectual property litigation, prosecution, and related business and technology matters.” Source: RevenueBase Database · checked Sep 21, 2026
19	Radulescu LLP	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1-10	8 contacts →
	Partial evidence “Radulescu LLP is a patent litigation firm that specializes in cases where a deep understanding of the interplay between technology and legal issues is critical to a company’s…” Source: RevenueBase Database · checked Sep 21, 2026
20	Powley & Gibson, P.C	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	8 contacts →
	Indirect evidence “Our firm advises and counsels clients on a wide range of intellectual property issues in various industries, including pharmaceutical, retail, food services, publishing, apparel…” Source: RevenueBase Database · checked Sep 21, 2026
21	Sisun LAW	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1-10	7 contacts →
	Partial evidence “Sisun Law, PLLC offers legal services in the fields of trademark, copyright, and patent law.” Source: RevenueBase Database · checked Sep 21, 2026
22	Wissing Miller LLP	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1-10	7 contacts →
	Indirect evidence “Intellectual Property Counseling and Legal Services” Source: RevenueBase Database · checked Sep 21, 2026
23	Villegas & Cefo LLP	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1-10	6 contacts →
	Indirect evidence “Intellectual property and complex litigation.” Source: RevenueBase Database · checked Sep 21, 2026
24	Natter & Associates, P.C	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1-10	6 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
25	RWS Inovia	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	501-1,000	6 contacts →
	Partial evidence “RWS inovia is the world’s leading expert in IP translations, foreign patent filing and patent search services.” Source: RevenueBase Database · checked Sep 21, 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: patent attorneys. 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 patent attorneys.
Partial evidence: Its own public description names part of patent attorneys, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name patent attorneys. 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 83 patent attorneys based in New York, United States

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Patent attorneys based in New York, United States at a glance

As of Sep 21, 2026

44.7%Verified-email coverage

19.0Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · New York

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

Email recency for this list is measured across the whole United States list rather than for New York, so it is reported there. Company counts and contact totals on this page are exact for New York, over 83 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 patent attorneys, 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 New York, United States whose own description of what they do matches “patent attorneys”. 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 patent attorneys), 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 patent attorneys, and records with no verified work email. Companies headquartered outside New York 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, 707 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 21, 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 attorneys by metro in the United States

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 patent attorneys, 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 patent attorneys are there based in New York, United States?

RevenueBase identified 83 patent attorneys headquartered in New York, 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?

Effectual Services, headquartered in New York, tops this list with the largest team on record.

Which city has the most patent attorneys?

New York leads with 83 headquartered companies, followed by Washington (76) and Chicago (63).

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 707 verified decision-maker contacts tracked across these 83 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 21, 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.