Company lists · Data refreshed September 2026

Top 21 Intellectual property law firms based in Chicago, United States

Name: Intellectual property law 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 4, 2026 121 companies tracked

RevenueBase identified 121 intellectual property law firms headquartered in Chicago, United States as of September 2026 and tracks 4,796 professional contacts across them, including 2,837 with verified work emails. New York is the largest hub.

This list covers intellectual property law firms headquartered in Chicago, 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

121Companies

4,796Contacts tracked

2,837Verified emails

Unlock all 121 companies Free signup · no credit card · 500 free credits

The 21 largest intellectual property law firms based in Chicago, United States

Ranked by team size

Top 21 of 121 intellectual property law firms based in Chicago, 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 law 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.
#	Company	Headquarters	Employees	Contacts
1	Banner WitcoffStrong evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	201-500	286
	“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.” Source: company website · checked Sep 4, 2026
2	Mcandrews, Held & Malloy, LTDStrong evidence	Chicago, United StatesHQ checked Sep 4, 2026	51-200	166
	“McAndrews, Held & Malloy is a premier, full-service intellectual property and technology law firm.” Source: company website · checked Sep 4, 2026
3	Mbhb Mcdonnell Boehnen Hulbert & Berghoff LLPIndirect evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	51-200	140
	“At MBHB, the legal and scientific credentials of our professionals are first rate.” Source: company website · checked Sep 4, 2026
4	Masuda FunaiIndirect evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	51-200	106
	“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…” Source: company website · checked Sep 4, 2026
5	Greer, Burns & Crain, LTDIndirect evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	51-200	81
	“Greer Burns & Crain, Ltd.” Source: company website · checked Sep 4, 2026
6	Pattishall, Mcauliffe, Newbury, Hilliard & Geraldson LLPIndirect evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	51-200	45
	“Pattishall McAuliffe is one of the largest U.S.” Source: company website · checked Sep 4, 2026
7	Hanley, Flight & Zimmerman, LLCPartial evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	51-200	40
	“HFZ is a boutique IP law firm located in the heart of Chicago, specializing in United States and foreign patent prosecution and counseling.” Source: company website · checked Sep 4, 2026
8	Citius MindsIndirect evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	11-50	35
	“Citius Minds is a leading technology consulting firm supporting clients in advanced patent analytics and end to end patent litigation services.” Source: company website · checked Sep 4, 2026
9	Rakoczy Molino Mazzochi Siwik LLPIndirect evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	51-200	34
	“RMMS consists of over 30 attorneys focused exclusively on life sciences patent and regulatory counseling, patent litigation under Hatch-Waxman and the BPCIA, as well as post-grant…” Source: company website · checked Sep 4, 2026
10	Wood PhillipsStrong evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	11-50	27
	“Intellectual Property Law Firm Wood Phillips is adept at all aspects of intellectual property, both domestically and internationally, including patent application preparation and…” Source: company website · checked Sep 4, 2026
11	Saper LAW Offices, LLCStrong evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	1-10	27
	“Saper Law is an intellectual property, social media, and business law firm with headline grabbing clients and cases.” Source: company website · checked Sep 4, 2026
12	Lempia Summerfield Katz LLCStrong evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	11-50	25
	“Lempia Summerfield Katz LLC specializes in patents, trademarks, copyrights, and other aspects of intellectual property protection and counseling.” Source: company website · checked Sep 4, 2026
13	Chapman Spingola, LLPPartial evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	11-50	21
	“Chapman Spingola is a nationally recognized, boutique law firm leveraging its large-firm experience and results-driven approach for clients ranging from small businesses to…” Source: company website · checked Sep 4, 2026
14	LEE Sullivan Shea & Smith LLPStrong evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	11-50	19
	“LS3 is a full-service intellectual property law firm that caters to the special needs of its clients on an individual basis.” Source: company website · checked Sep 4, 2026
15	Cook Alex LTDStrong evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	11-50	19
	“Cook Alex and its predecessors have a distinguished history of providing differentiated intellectual property legal services to a domestic and international client base.” Source: company website · checked Sep 4, 2026
16	Flener IP & Business LAWPartial evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	11-50	17
	“FLENER IP & Business Law is a WBE-Certified women-owned business.” Source: company website · checked Sep 4, 2026
17	Chip LAW GroupStrong evidence	Chicago, United StatesHQ checked Sep 4, 2026	11-50	15
	“CHIP LAW GROUP specializes in providing Intellectual Property (IP) Law services, with a special emphasis on obtaining Patents across a broad spectrum of technology areas.” Source: company website · checked Sep 4, 2026
18	Ziliak Law, LLCPartial evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	11-50	15
	“The attorneys at Ziliak Law care about your business.” Source: company website · checked Sep 4, 2026
19	IP SpringIndirect evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	11-50	12
	Source: company website · checked Sep 4, 2026
20	Scandaglia LAW LLPPartial evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	11-50	11
	“Porter Wright Morris & Arthur LLP is pleased to announce that four attorneys from the Chicago-based litigation boutique Scandaglia Law LLP have joined the firm, significantly…” Source: company website · checked Sep 4, 2026
21	Klintworth & Rozenblat LLPIndirect evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	11-50	10
	“Klintworth & Rozenblat LLP is a legal services company based out of 19 N GREEN ST, Chicago, Illinois, United States.” Source: company website · checked Sep 4, 2026

Showing 21 of 121 intellectual property law firms based in Chicago, United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 2,837 reachable decision-makers.

Free signup · no credit card

See all 121 companies

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

As of Sep 4, 2026

1-10Median size (employees)

New YorkLargest hub · 276 HQs

Contacts with mobile numbers

Sep 4, 2026Data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

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 Chicago, over 121 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 law 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 Chicago, United States whose own description of what they do matches “intellectual property law 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 law firms, and records with no verified work email. Companies headquartered outside Chicago 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, 2,837 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.

Intellectual property law firms by metro in the United States

Frequently asked

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

RevenueBase identified 121 intellectual property law firms headquartered in Chicago, 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?

Banner Witcoff, headquartered in Chicago, tops this list with the largest team on record.

Which city has the most intellectual property law firms?

New York leads with 276 headquartered companies, followed by Chicago (121) and Washington (117).

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 2,837 verified decision-maker contacts tracked across these 121 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.

Ready to reach these companies? Verified emails and direct dials for all 121 intellectual property law firms based in Chicago, United States. Start with a free account, no credit card.

Get the full list

Related lists

Intellectual property law firms by geography

Browse the directory

Browse: Companies home · Intellectual property law firms in United States · All United States lists · All Intellectual property law firms lists · New lists

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.