Company lists · Data refreshed September 2026

Top 25 Software patent law firms based in New York, United States

Name: Software patent law 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 6, 2026 324 companies tracked

RevenueBase identified 324 software patent law firms headquartered in New York, United States as of September 2026 and tracks 8,412 professional contacts across them, including 5,025 with verified work emails. New York is the largest hub.

This list covers software patent law 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 6, 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 6, 2026 86% judged on-target in blind review

324Companies

8,412Contacts tracked

5,025Verified emails

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The 25 largest software patent law firms based in New York, United States

Ranked by team size

Top 25 of 324 software patent law firms based in New York, United States, ranked by team size, largest first. Data refreshed Sep 6, 2026. RevenueBase Smart Search rates how each company's information relates to software patent law 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	Pillsbury Winthrop Shaw Pittman LLP	Partial evidence	New York, NY, United StatesHQ checked Sep 6, 2026	1,001-5,000	1,949 contacts →
	“Pillsbury is one of the world’s foremost law firms, operating at the intersection of technology innovation, capital and government.” Source: company website · checked Sep 6, 2026
2	Lowenstein Sandler LLP	Partial evidence	New York, NY, United StatesHQ checked Sep 6, 2026	501-1,000	851 contacts →
	“Lowenstein Sandler LLP is a national law firm with over 400 lawyers based in New York, Palo Alto, Roseland, Salt Lake City, San Francisco, Washington, D.C, and Wilmington.” Source: company website · checked Sep 6, 2026
3	Kelley Drye & Warren LLP	Partial evidence	New York, NY, United StatesHQ checked Sep 6, 2026	501-1,000	690 contacts →
	“Kelley Drye is an AmLaw 200 law firm of more than 350 lawyers and other professionals practicing in New York, NY; Washington, D.C; Chicago, IL; Houston, TX, Los Angeles, CA; San…” Source: company website · checked Sep 6, 2026
4	Pierson Ferdinand LLP	Partial evidence	New York, NY, United StatesHQ checked Sep 6, 2026	201-500	279 contacts →
	“Pierson Ferdinand is a global law firm serving clients from over 25 markets.” Source: company website · checked Sep 6, 2026
5	Davis Gilbert LLP	Indirect evidence	New York, United StatesHQ checked Sep 6, 2026	201-500	247 contacts →
	“Davis+Gilbert helped guide the development of the marketing communications ecosystem over the past century.” Source: company website · checked Sep 6, 2026
6	Effectual Services	Partial evidence	New York, NY, United StatesHQ checked Sep 6, 2026	201-500	242 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 6, 2026
7	Axinn, Veltrop & Harkrider LLP	Indirect evidence	New York, NY, United StatesHQ checked Sep 6, 2026	51-200	196 contacts →
	“A firm to turn to when all seems hopeless"-Chambers USA Axinn combines the skills, experience and dedication of the world's largest firms with the focus, responsiveness…” Source: company website · checked Sep 6, 2026
8	Ellenoff Grossman & Schole LLP	Partial evidence	New York, NY, United StatesHQ checked Sep 6, 2026	51-200	183 contacts →
	“Ellenoff Grossman & Schole LLP is a New York City-based law firm comprised of over 125 professionals, offering its clients legal services in a broad range of business related…” Source: company website · checked Sep 6, 2026
9	Fross Zelnick Lehrman & Zissu	Partial evidence	New York, NY, United StatesHQ checked Sep 6, 2026	51-200	182 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 6, 2026
10	Desmarais LLP	Indirect evidence	New York, NY, United StatesHQ checked Sep 6, 2026	51-200	140 contacts →
	“Desmarais LLP is a leading intellectual property litigation firm with offices in New York, San Francisco, and Washington, D.C.” Source: company website · checked Sep 6, 2026
11	Ladas & Parry LLP	Indirect evidence	New York, NY, United StatesHQ checked Sep 6, 2026	51-200	135 contacts →
	“As an enterprise grows, its need for intellectual property (IP) protection expands.” Source: company website · checked Sep 6, 2026
12	Kenyon & Kenyon LLP	Partial evidence	New York, NY, United StatesHQ checked Sep 6, 2026	n/a	117 contacts →
	“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 6, 2026
13	HG LAW LLP	Strong evidence	New York, NY, United StatesHQ checked Sep 6, 2026	51-200	100 contacts →
	“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: company website · checked Sep 6, 2026
14	Cowan, Liebowitz & Latman, P.C	Partial evidence	New York, NY, United StatesHQ checked Sep 6, 2026	51-200	94 contacts →
	“We are a boutique full-service firm recognized worldwide in the areas of intellectual property law and litigation.” Source: company website · checked Sep 6, 2026
15	Dorf Nelson & Zauderer LLP	Partial evidence	New York, NY, United StatesHQ checked Sep 6, 2026	51-200	88 contacts →
	“Dorf Nelson & Zauderer LLP is a national law firm with offices in New York, California, and New Jersey, representing corporations, executives, boards, private equity-backed…” Source: company website · checked Sep 6, 2026
16	Amster Rothstein & Ebenstein LLP	Partial evidence	New York, NY, United StatesHQ checked Sep 6, 2026	51-200	85 contacts →
	“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 6, 2026
17	Haug Partners LLP	Indirect evidence	New York, NY, United StatesHQ checked Sep 6, 2026	51-200	81 contacts →
	“For over 25 years, Haug Partners has provided synthesized multidisciplinary legal services for life science and technology businesses.” Source: company website · checked Sep 6, 2026
18	Siri & Glimstad LLP	Indirect evidence	New York, NY, United StatesHQ checked Sep 6, 2026	51-200	79 contacts →
	“Siri & Glimstad LLP has offices across the country and represents individuals and corporations in federal and state courts nationwide.” Source: company website · checked Sep 6, 2026
19	Skarzynski Marick & Black LLP	Partial evidence	New York, NY, United StatesHQ checked Sep 6, 2026	51-200	78 contacts →
	“Skarzynski Marick is a business law firm with extensive experience in insurance.” Source: company website · checked Sep 6, 2026
20	Abrams Garfinkel Margolis Bergson, LLP Agmb	Partial evidence	New York, NY, United StatesHQ checked Sep 6, 2026	51-200	78 contacts →
	“WHO WE ARE Abrams Garfinkel Margolis Bergson, LLP is a full-service law firm dedicated to smart, practical and cost-effective counsel.” Source: company website · checked Sep 6, 2026
21	Constantine Cannon LLP	Indirect evidence	New York, NY, United StatesHQ checked Sep 6, 2026	51-200	74 contacts →
	“No other.” Source: company website · checked Sep 6, 2026
22	Ballon Stoll P.C	Indirect evidence	New York, NY, United StatesHQ checked Sep 6, 2026	11-50	70 contacts →
	“Grounded in History; Poised for the Future Founded in 1931 and built upon a tradition of excellence, Ballon Stoll P.C.” Source: company website · checked Sep 6, 2026
23	Wilk Auslander LLP	Partial evidence	New York, NY, United StatesHQ checked Sep 6, 2026	51-200	69 contacts →
	“Wilk Auslander is a full-service law firm delivering the expertise and resources of a large firm combined with the attention and access of a boutique firm.” Source: company website · checked Sep 6, 2026
24	Bochner Pllc	Indirect evidence	New York, NY, United StatesHQ checked Sep 6, 2026	51-200	61 contacts →
	“At Bochner, we help our clients across the globe navigate their legal, business, and regulatory challenges – from startup to exit.” Source: company website · checked Sep 6, 2026
25	Herzfeld Rubin, P.C	Partial evidence	New York, NY, United StatesHQ checked Sep 6, 2026	11-50	59 contacts →
	“Herzfeld + Rubin is a full-service, internationally-recognized law firm with more than 70 years of experience, headquartered in Manhattan’s Financial District.” Source: company website · checked Sep 6, 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: software 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 software patent law firms.
Partial evidence: Its own public description names part of software 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 software 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 324 software patent law firms based in New York, United States

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Software patent law firms based in New York, United States at a glance

As of Sep 6, 2026

59.7%Verified-email coverage

26.0Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · New York

Sep 6, 2026Page data refreshed

Companies by employee count

1-10

224

11-50

51-200

201-500

501-1,000

1,001-5,000

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 324 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 software 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 New York, United States whose own description of what they do matches “software 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 software 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 software patent law 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, 5,025 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 6, 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.

Software patent law 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 software 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 software patent law firms are there based in New York, United States?

RevenueBase identified 324 software patent law 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?

Pillsbury Winthrop Shaw Pittman LLP, headquartered in New York, tops this list with the largest team on record.

Which city has the most software patent law firms?

New York leads with 324 headquartered companies, followed by Chicago (175) and Los Angeles (160).

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 5,025 verified decision-maker contacts tracked across these 324 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 6, 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.