Illinois

Patent attorneys in Illinois

Illinois hosts 2,917 active patent practitioners registered with the USPTO Office of Enrollment and Discipline. Patent attorneys and patent agents can both prepare and file patent applications, but only patent attorneys can also offer legal advice on prosecution strategy, freedom-to-operate analyses, and infringement opinions in Illinois. Practitioners are concentrated across 20 cities, with the largest clusters in the metros listed below. Notable firms with multiple registered practitioners in the state include Jones Day, Cardinal Law Group, and Turtle Wax, Inc..

Top cities in Illinois

All practitioners in Illinois

Leslie B Wilson

Reg. 33816

Patent attorney

Cardinal Law Group

Evanston, IL · 60201

847-905-7111

Kathleen M. Wilt

Reg. 67960

Patent attorney

Turtle Wax, Inc.

Lombard, IL · 60148

630-455-3815

Vincent E Wiltse

Reg. 50508

Patent attorney

GTL

Arlington Heights, IL · 60005

847-269-1424

Thomas J Wimbiscus

Reg. 36059

Patent attorney

McAndrews Held and Malloy LTD

Chicago, IL · 60661

312-775-8000

Charles D Wineland· III

Reg. 65598

Patent attorney

meShare Inc.

Champaign, IL · 61822

217-621-8098

Barry A. Winkler

Reg. 66778

Patent attorney

Deere & Company

Moline, IL · 61265

309-748-8479

John K Winn

Reg. 58579

Patent attorney

Leydig Voit and Mayer, Ltd.

Chicago, IL · 60601

312-616-5600

Christopher C Winslade

Reg. 36308

Patent attorney

McAndrews Held & Malloy, Ltd

Chicago, IL · 60661

312-775-8108

Adam R Wirtz

Reg. 74360

Patent attorney

Roscich & Martel Law Firm, LLC

Naperville, IL · 60540

630-355-5222

Brian M Wishnow

Reg. 54547

Patent attorney

USG Corporation

Chicago, IL · 60661

312-436-6115

David L Witcoff

Reg. 31443

Patent attorney

Jones Day

Chicago, IL · 60601

312-269-4259

Robert T Wittmann

Reg. 54549

Patent attorney

Leydig Voit and Mayer LTD

Chicago, IL · 60601

312-616-5600

Kamil M Wojdyla

Reg. 78735

Patent agent

Palos Hills, IL · 60465

708-566-0353

Adam Wolek

Reg. 66090

Patent attorney

Fox Rothschild LLP

Chicago, IL · 60654

312-860-9006

Thomas E Wolff

Reg. 37476

Patent agent

Wolff Information Consulting, LLC

Lisle, IL · 60532

630-305-9131

Christian Triplett Wolfgram

Reg. 78839

Patent agent

Banner Witcoff

Chicago, IL · 60606

314-583-6343

Yvonne M Wolny

Reg. 80738

Patent attorney

Yvonne Wolny

Chicago, IL · 60611

312-714-0717

Frankie W. Wong

Reg. 61832

Patent agent

Benesch, Friedlander, Coplan & Aronoff LLP

Chicago, IL · 60606

312-624-6371

Yuen Y. Wong

Reg. 66779

Patent agent

Orland Park, IL · 60462

312-593-0989

Brian Richard Woodworth

Reg. 33137

Patent attorney

Lake Forest, IL · 60045

847-651-8127

Michael J Word

Reg. 57386

Patent attorney

Mayer Brown LLP

Chicago, IL · 60606

312-701-7355

Roger L Worrell

Reg. 49004

Patent attorney

Chicago, IL · 60641

773-427-5140

Jana D Wozniak

Reg. 46806

Patent attorney

Elmhurst, IL · 60126

312-593-8236

Vanessa Amee Wren

Reg. 902822

Limited recognition

DePaul University College of Law

Chicago, IL · 60604

Colin Wright

Reg. 62900

Patent attorney

McDonnell Boehnen Hulbert & Berghoff LLP

Chicago, IL · 60606

312-913-3385

Debbie K Wright

Reg. 33817

Patent attorney

Chicago, IL · 60605

312-945-0507

Gordon M Wright

Reg. 62506

Patent attorney

Reinhart Boerner Van Deuren P.C.

Rockford, IL · 61107

815-633-5300

John H Wright· III

Reg. 80505

Patent attorney

Jones Day

Chicago, IL · 60606

312-269-4071

John S Wrona

Reg. 25946

Patent attorney

Chicago, IL · 60633

773-646-0022

Thomas J Wrona

Reg. 44410

Patent attorney

Marshall, Gerstein & Borun LLP

Chicago, IL · 60606

312-474-6300

Common questions

Do I need a patent attorney based in Illinois?

No. Every USPTO-registered patent practitioner is licensed to file applications on behalf of inventors in any state, regardless of where the practitioner's office is. Choosing a Illinois-based practitioner can simplify in-person inventor signings, local meetings, and same-time-zone calls, but it is not a legal requirement.

How many patent attorneys are licensed in Illinois?

2,917 active USPTO-registered patent practitioners list a Illinois office address on the OEDCI roster. This includes both patent attorneys (who can also offer legal advice) and patent agents (who can prepare and file patents but not offer broader legal advice).

What is the difference between a patent attorney and a patent agent?

Both pass the USPTO Patent Bar and can prepare, file, and prosecute patent applications. Only patent attorneys also hold a state bar license, meaning they can additionally offer legal advice on infringement, licensing, and litigation strategy. Patent agents tend to charge less per hour and are common at large in-house IP departments.