Company lists · Data refreshed September 2026

Top 25 Intellectual property litigation firms based in Chicago, United States

Name: Intellectual property litigation firms based in Chicago, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 242 companies tracked

RevenueBase identified 242 company matches for intellectual property litigation firms associated with Chicago, United States as of September 2026 and tracks 6,248 professional contacts across them, including 3,648 with verified work emails. Across the United States, New York is the largest hub for this category (512 companies); Chicago has 242.

This list covers company matches for intellectual property litigation firms associated with Chicago, United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 20, 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 RevenueBase SmartSearch · Exact Recorded Sep 20, 2026 How this list was built

242Companies

6,248Contacts tracked

3,648Verified emails

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The 25 largest intellectual property litigation firms based in Chicago, United States

Ranked by team size

Top 25 of 242 company matches for intellectual property litigation firms based in Chicago, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 20, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Amundsen Davis, LLC	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	201-500	542 contacts →
	Exact match “Amundsen Davis is a law firm comprised of over 250 attorneys headquartered in Chicago.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
2	Litchfield Cavo LLP	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	501-1,000	424 contacts →
	Exact match “Litchfield Cavo LLP began as a small firm of attorneys experienced in insurance and business defense matters.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
3	Banner Witcoff	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	201-500	288 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
4	Swanson, Martin & Bell, LLP	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	201-500	254 contacts →
	Exact match “Swanson, Martin & Bell, LLP was founded in 1992 by a group of trial lawyers who left a large Chicago firm to better serve the needs of their clients.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
5	Barack Ferrazzano Kirschbaum & Nagelberg LLP	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	201-500	250 contacts →
	Exact match “Barack Ferrazzano was founded in 1984 with a vision focused on delivering efficient, team-oriented services of the highest quality.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
6	Tressler LLP	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	51-200	237 contacts →
	Exact match “Tressler LLP is a national law firm headquartered in Chicago, with ten offices located in six states - California, Illinois, Missouri, New Jersey, New York and Pennsylvania.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
7	Marshall, Gerstein & Borun LLP	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	51-200	213 contacts →
	Exact match “Marshall, Gerstein & Borun LLP has one focus - intellectual property law.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
8	Much Shelist, P.C	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	51-200	203 contacts →
	Exact match “We're Much.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
9	Cassiday Schade LLP	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	51-200	186 contacts →
	Exact match “Cassiday Schade is a litigation law firm headquartered in Chicago, with national presence.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
10	Mcandrews, Held & Malloy, LTD	Exact match	Chicago, United StatesHQ recorded Sep 20, 2026	51-200	162 contacts →
	Exact match “McAndrews, Held & Malloy is a premier, full-service intellectual property and technology law firm.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
11	Leydig, Voit & Mayer, LTD	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	51-200	157 contacts →
	Exact match “Leydig, Voit & Mayer remains at the forefront of intellectual property law, providing advice and counsel in intellectual property litigation, licensing, and prosecution services…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
12	Mbhb Mcdonnell Boehnen Hulbert & Berghoff LLP	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	51-200	143 contacts →
	Exact match “At MBHB, the legal and scientific credentials of our professionals are first rate.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
13	Bartlit Beck LLP	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	51-200	130 contacts →
	Exact match “Delivering extraordinary results to leading companies and individuals in their most important matters.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
14	Fitch, Even, Tabin & Flannery LLP	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	51-200	109 contacts →
	Exact match “With over 160 years of experience, Fitch, Even, Tabin & Flannery LLP is Chicago’s oldest law firm in continuous practice and a national leader in the field of intellectual…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
15	Masuda Funai	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	51-200	102 contacts →
	Exact match “Since its founding in 1929, Masuda Funai has focused its practice on successfully representing international and domestic companies entering, operating and expanding in the United…” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
16	Greer, Burns & Crain, LTD	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	51-200	80 contacts →
	Exact match “Greer Burns & Crain, Ltd.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
17	Aronberg Goldgehn	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	51-200	75 contacts →
	Exact match “Aronberg Goldgehn is a premier full-service business law and litigation firm with offices in Chicago and Wheaton, Illinois.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
18	Goldman Ismail Tomaselli Brennan & Baum LLP	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	11-50	72 contacts →
	Exact match “Goldman Ismail Tomaselli Brennan & Baum LLP is a litigation boutique based in Chicago, with offices in Dallas and Santa Monica.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
19	Downey & Lenkov LLC	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	51-200	68 contacts →
	Exact match “Downey & Lenkov LLC was founded in 2001 by professionals from large Chicago law firms who are committed to providing world-class service but prefer a mid-sized firm setting.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
20	Eimer Stahl LLP	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	51-200	65 contacts →
	Exact match “Eimer Stahl is a boutique commercial litigation firm headquartered in Chicago, with offices in Madison, Silicon Valley, San Francisco, and Nashville.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
21	Rock Fusco & Connelly, LLC	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	11-50	61 contacts →
	Exact match “Rock Fusco Connelly, LLC is a full service – general practice law firm.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
22	Christensen HSU Sipes LLP	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	11-50	53 contacts →
	Exact match “Christensen Hsu Sipes LLP is a law firm with offices in Chicago, Northwest Indiana, Los Angeles, and Sacramento.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
23	Pattishall, Mcauliffe, Newbury, Hilliard & Geraldson LLP	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	51-200	44 contacts →
	Exact match “Pattishall McAuliffe is one of the largest U.S.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
24	Langhenry, Gillen, Lundquist & Johnson, LLC	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	11-50	41 contacts →
	Exact match “As a firm of trial attorneys, we understand the cost and risk associated with litigation.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
25	Hanley, Flight & Zimmerman, LLC	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 2026	51-200	40 contacts →
	Exact match “HFZ is a boutique IP law firm located in the heart of Chicago, specializing in United States and foreign patent prosecution and counseling.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “intellectual property litigation firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 242 intellectual property litigation firms based in Chicago, United States

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Intellectual property litigation firms based in Chicago, United States at a glance

As of Sep 20, 2026

58.4%Verified-email coverage

25.8Average contacts per company

1-10Median size (employees)

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

151

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 for Chicago, so it is reported there. Company counts and contact totals on this page are exact for Chicago, over 242 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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: Company records associated with Chicago, United States whose business descriptions match “intellectual property litigation firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 3,648 professional contacts with verified work emails across the full matched dataset. 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 20, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Intellectual property litigation firms by metro in the United States

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “intellectual property litigation firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many intellectual property litigation firms are there based in Chicago, United States?

RevenueBase identified 242 company matches for intellectual property litigation firms associated with Chicago, United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Amundsen Davis, LLC tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in the United States has the most intellectual property litigation firms?

New York leads the United States with 512 company records, followed by Los Angeles (278) and Chicago (242).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 3,648 professional contacts with verified work emails tracked across these 242 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 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.