Company lists · Data refreshed September 2026

Top 19 Intellectual property outsourcing firms based in New York, United States

RevenueBase identified 114 intellectual property outsourcing firms headquartered in New York, United States as of September 2026 and tracks 2,276 professional contacts across them, including 989 with verified work emails. New York is the largest hub.

This list covers intellectual property outsourcing 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, how directly it supports the match, and when it was last checked. Data refreshed September 4, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 Match evidence on every row Refreshed Sep 4, 2026 86% judged on-target in blind review
114Companies
2,276Contacts tracked
989Verified emails
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The 19 largest intellectual property outsourcing firms based in New York, United States

Ranked by team size
Top 19 of 114 intellectual property outsourcing firms based in New York, United States, ranked by team size, largest first. Data refreshed Sep 4, 2026. Evidence rates how directly each company's own description names intellectual property outsourcing firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#CompanyHeadquartersEmployeesContacts
1New York, NY, United StatesHQ checked Sep 4, 202651-200181

“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 4, 2026
2
Legal Outsourcing 2.0Partial evidence
New York, NY, United StatesHQ checked Sep 4, 202651-200140

“Legal Outsourcing 2.0, as the name suggests, is the next generation of Legal Process Outsourcing.”

Source: company website · checked Sep 4, 2026
3
Ladas & Parry LLPStrong evidence
New York, NY, United StatesHQ checked Sep 4, 202651-200135

“As an enterprise grows, its need for intellectual property (IP) protection expands.”

Source: company website · checked Sep 4, 2026
4
Kenyon & Kenyon LLPStrong evidence
New York, NY, United StatesHQ checked Sep 4, 2026n/a117

“Kenyon & Kenyon LLP is a leading intellectual property law firm whose sophisticated and business-oriented approach helps clients succeed with their intellectual property…”

Source: company website · checked Sep 4, 2026
5New York, NY, United StatesHQ checked Sep 4, 202651-20094

“We are a boutique full-service firm recognized worldwide in the areas of intellectual property law and litigation.”

Source: company website · checked Sep 4, 2026
6New York, NY, United StatesHQ checked Sep 4, 202651-20085

“Since 1953, Amster, Rothstein & Ebenstein LLP has focused exclusively on representing clients in all facets of intellectual property law both domestically and internationally.”

Source: company website · checked Sep 4, 2026
7
GardenIndirect evidence
New York, NY, United StatesHQ checked Sep 4, 2026n/a58

“A trusted partner in IP Value Capture + Creation.”

Source: company website · checked Sep 4, 2026
8
JayaramIndirect evidence
New York, NY, United StatesHQ checked Sep 4, 202611-5034

“Jayaram advises individuals and companies around the world, supporting cutting-edge creators, innovators, and change-makers.”

Source: company website · checked Sep 4, 2026
9New York, NY, United StatesHQ checked Sep 4, 202611-5034
Source: company website · checked Sep 4, 2026
10New York, NY, United StatesHQ checked Sep 4, 202651-20031

“Lexitas provides legal staffing, document review and commercial contracts outsourcing services.”

Source: company website · checked Sep 4, 2026
11
Lucas & Mercanti LLPStrong evidence
New York, NY, United StatesHQ checked Sep 4, 202611-5028

“Lucas & Mercanti is an intellectual property law firm.”

Source: company website · checked Sep 4, 2026
12
Ostrolenk Faber LLPStrong evidence
New York, NY, United StatesHQ checked Sep 4, 202651-20025

“Ostrolenk Faber is a premier intellectual property boutique law firm.”

Source: company website · checked Sep 4, 2026
13
Epstein Drangel LLPStrong evidence
New York, NY, United StatesHQ checked Sep 4, 202611-5023

“Epstein Drangel LLP is a leading intellectual property law firm.”

Source: company website · checked Sep 4, 2026
14
Gs2lawStrong evidence
New York, NY, United StatesHQ checked Sep 4, 202611-5023

“GS2Law is a boutique law firm focused on intellectual property, dispute resolution and commercial transactional matters.”

Source: company website · checked Sep 4, 2026
15
Gish PllcIndirect evidence
New York, NY, United StatesHQ checked Sep 4, 202611-5017

“Large publicly traded companies and cutting-edge startups trust Gish PLLC to handle their most intricate IP matters.”

Source: company website · checked Sep 4, 2026
16
Handal & Morofsky, LLCStrong evidence
New York, NY, United StatesHQ checked Sep 4, 202611-5013

“Handal & Morofsky, LLC is a boutique law firm focusing on intellectual property and internet law.”

Source: company website · checked Sep 4, 2026
17
FAY Kaplun & Marcin, LLPStrong evidence
New York, NY, United StatesHQ checked Sep 4, 202611-5012

“Fay Kaplun & Marcin, LLP specializes in Intellectual Property (IP) Law, assisting clients with identifying, analyzing and protecting IP, including patents, trademarks, copyrights…”

Source: company website · checked Sep 4, 2026
18New York, NY, United StatesHQ checked Sep 4, 202611-509

“LGC is a New York City-based boutique law firm specializing in intellectual property litigation, prosecution, and related business and technology matters.”

Source: company website · checked Sep 4, 2026
19
Powley & Gibson, P.CStrong evidence
New York, NY, United StatesHQ checked Sep 4, 202611-508

“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: company website · checked Sep 4, 2026

Showing 19 of 114 intellectual property outsourcing firms based in New York, United States

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

As of Sep 4, 2026
1-10Median size (employees)
New YorkLargest hub · 114 HQs
Contacts with mobile numbers
Sep 4, 2026Data refreshed

Companies by employee count

1-10
82
11-50
21
51-200
9
201-500
1
1,001-5,000
1

Email recency for this list is measured across the whole United States list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for New York, over 114 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 outsourcing firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 outsourcing firms”. Matching reads each company's description, not its industry code or its name.
What we exclude
Companies whose own description does not clearly place them among intellectual property outsourcing 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 an evidence 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, 989 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 4, 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 outsourcing firms are there based in New York, United States?

RevenueBase identified 114 intellectual property outsourcing 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?

Fross Zelnick Lehrman & Zissu, headquartered in New York, tops this list with the largest team on record.

Which city has the most intellectual property outsourcing firms?

New York leads with 114 headquartered companies, followed by Washington (77) and Chicago (64).

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 989 verified decision-maker contacts tracked across these 114 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 4, 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 SmartSearch, 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.