Company lists · Data refreshed September 2026

Top 25 Intellectual property management firms based in New York, United States

Name: Intellectual property management firms 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 17, 2026 150 companies tracked

RevenueBase identified 150 intellectual property management firms headquartered in New York, United States as of September 2026 and tracks 2,562 professional contacts across them, including 1,046 with verified work emails. New York is the largest hub.

This list covers intellectual property management firms 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 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

150Companies

2,562Contacts tracked

1,046Verified emails

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The 25 largest intellectual property management firms based in New York, United States

Ranked by team size

Top 25 of 150 intellectual property management firms based in New York, United States, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to intellectual property management 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	Effectual Services	Indirect evidence	New York, NY, United StatesHQ checked Sep 17, 2026	201-500	242 contacts →
	Indirect 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
2	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
3	FADEL	Indirect evidence	New York, NY, United StatesHQ checked Sep 17, 2026	51-200	176 contacts →
	Indirect evidence “FADEL delivers AI-enabled software to manage brand compliance and IP licensing with precision and confidence.” Source: RevenueBase Database · checked Sep 17, 2026
4	Desmarais LLP	Strong evidence	New York, NY, United StatesHQ checked Sep 17, 2026	51-200	140 contacts →
	Strong 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
5	Ladas & Parry LLP	Strong evidence	New York, NY, United StatesHQ checked Sep 17, 2026	51-200	135 contacts →
	Strong evidence “As an enterprise grows, its need for intellectual property (IP) protection expands.” Source: RevenueBase Database · checked Sep 17, 2026
6	Pars International Corp	Indirect evidence	New York, United StatesHQ checked Sep 17, 2026	11-50	121 contacts →
	Indirect evidence “A leading publishing industry innovator for over 30 years, PARS International is proud to be the official content and IP licensing agent for many of the world’s top media brands.” Source: RevenueBase Database · checked Sep 17, 2026
7	Kenyon & Kenyon LLP	Strong evidence	New York, NY, United StatesHQ checked Sep 17, 2026	n/a	117 contacts →
	Strong 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 17, 2026
8	HG LAW LLP	Strong evidence	New York, NY, United StatesHQ checked Sep 17, 2026	51-200	100 contacts →
	Strong 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 17, 2026
9	Cowan, Liebowitz & Latman, P.C	Strong evidence	New York, NY, United StatesHQ checked Sep 17, 2026	51-200	94 contacts →
	Strong evidence “We are a boutique full-service firm recognized worldwide in the areas of intellectual property law and litigation.” Source: RevenueBase Database · checked Sep 17, 2026
10	Blackbox IP Corporation	Indirect evidence	New York, NY, United StatesHQ checked Sep 17, 2026	51-200	90 contacts →
	Indirect evidence “For IP Leaders by IP Professionals: Decades of experience in serving Fortune 500 Corporations & Leading Law Firms.” Source: RevenueBase Database · checked Sep 17, 2026
11	Azami Global	Strong evidence	New York, NY, United StatesHQ checked Sep 17, 2026	51-200	87 contacts →
	Strong evidence “Azami Global is a leading provider of international intellectual property services, helping law firms, corporations, and IP professionals protect innovation around the world.” Source: RevenueBase Database · checked Sep 17, 2026
12	Amster Rothstein & Ebenstein LLP	Strong evidence	New York, NY, United StatesHQ checked Sep 17, 2026	51-200	85 contacts →
	Strong 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 17, 2026
13	Garden	Indirect evidence	New York, NY, United StatesHQ checked Sep 17, 2026	n/a	64 contacts →
	Indirect evidence “A trusted partner in IP Value Capture + Creation.” Source: RevenueBase Database · checked Sep 17, 2026
14	Copperpod IP	Indirect evidence	New York, United StatesHQ checked Sep 17, 2026	11-50	47 contacts →
	Indirect evidence “Copperpod IP provides technical analysis services for patent litigation and licensing.” Source: RevenueBase Database · checked Sep 17, 2026
15	Jayaram	Indirect evidence	New York, NY, United StatesHQ checked Sep 17, 2026	11-50	34 contacts →
	Indirect evidence “Jayaram advises individuals and companies around the world, supporting cutting-edge creators, innovators, and change-makers.” Source: RevenueBase Database · checked Sep 17, 2026
16	Gottlieb, Rackman & Reisman, P.C	Indirect evidence	New York, NY, United StatesHQ checked Sep 17, 2026	11-50	34 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
17	Lucas & Mercanti LLP	Strong evidence	New York, NY, United StatesHQ checked Sep 17, 2026	11-50	28 contacts →
	Strong evidence “Lucas & Mercanti is an intellectual property law firm.” Source: RevenueBase Database · checked Sep 17, 2026
18	Klaris LAW Pllc	Strong evidence	New York, NY, United StatesHQ checked Sep 17, 2026	11-50	27 contacts →
	Strong evidence “Backed by more than 25 years of experience, Klaris is a boutique media, entertainment, technology, and intellectual property law firm that guides its clients through a changing IP…” Source: RevenueBase Database · checked Sep 17, 2026
19	Ostrolenk Faber LLP	Strong evidence	New York, NY, United StatesHQ checked Sep 17, 2026	51-200	26 contacts →
	Strong evidence “Ostrolenk Faber is a premier intellectual property boutique law firm.” Source: RevenueBase Database · checked Sep 17, 2026
20	Epstein Drangel LLP	Strong evidence	New York, NY, United StatesHQ checked Sep 17, 2026	11-50	23 contacts →
	Strong evidence “Epstein Drangel LLP is a leading intellectual property law firm.” Source: RevenueBase Database · checked Sep 17, 2026
21	Adelman Matz P.C	Indirect evidence	New York, NY, United StatesHQ checked Sep 17, 2026	11-50	22 contacts →
	Indirect evidence “Solving problems, Managing issues, litigating complex lawsuits, protecting assets, building brands and giving practical daily business advice.” Source: RevenueBase Database · checked Sep 17, 2026
22	Gs2law	Strong evidence	New York, NY, United StatesHQ checked Sep 17, 2026	11-50	22 contacts →
	Strong evidence “GS2Law is a boutique law firm focused on intellectual property, dispute resolution and commercial transactional matters.” Source: RevenueBase Database · checked Sep 17, 2026
23	Gemini LAW LLP	Indirect evidence	New York, NY, United StatesHQ checked Sep 17, 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 17, 2026
24	Notaro, Michalos & Zaccaria P.C	Indirect evidence	New York, NY, United StatesHQ checked Sep 17, 2026	11-50	21 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
25	Alter, Kendrick & Baron, LLP	Indirect evidence	New York, United StatesHQ checked Sep 17, 2026	1-10	19 contacts →
	Indirect evidence “Alter, Kendrick & Baron, LLP’s practice is focused on domestic and international copyright law as it pertains to the music industry as well as complex transactions involving…” 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: intellectual property management 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 intellectual property management firms.
Partial evidence: Its own public description names part of intellectual property management firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name intellectual property management 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 150 intellectual property management firms based in New York, United States

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Intellectual property management firms based in New York, United States at a glance

As of Sep 17, 2026

40.8%Verified-email coverage

17.1Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · New York

Sep 17, 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 150 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 intellectual property management 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 New York, United States whose own description of what they do matches “intellectual property management 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 intellectual property management 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 intellectual property management firms, 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, 1,046 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.

Intellectual property management firms 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 intellectual property management 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 intellectual property management firms are there based in New York, United States?

RevenueBase identified 150 intellectual property management firms 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 intellectual property management firms?

New York leads with 150 headquartered companies, followed by Chicago (77) and Washington (76).

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 1,046 verified decision-maker contacts tracked across these 150 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.