Illinois

Patent attorneys in Illinois

Illinois hosts 2,889 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 CC Industries, Inc., JPMorgan Chase, and McGowen and McGowen PC.

Top cities in Illinois

All practitioners in Illinois

Paul M McGinley

Reg. 55443

Patent agent

CC Industries, Inc.

Chicago, IL · 60601

312-750-6675

John H McGowen· V

Reg. 79311

Patent agent

JPMorgan Chase

Chicago, IL · 60603

312-732-5177

Thomas C McGowen

Reg. 47783

Patent attorney

McGowen and McGowen PC

Wheaton, IL · 60187

630-597-7777

Timothy McGrath

Reg. 55967

Patent agent

Chicago, IL · 60622

773-252-1778

Gordon Neal McGrew

Reg. 37393

Patent agent

Wm. Wrigley Jr. Company

Chicago, IL · 60642

312-794-6015

John Joseph McGuirk

Reg. 36865

Patent attorney

Rakoczy Mollno Mazzochi Siwik

Chicago, IL · 60654

312-222-6309

Kirk M McInerney

Reg. 28970

Patent attorney

McInerney LTD/ IP Transactions Group LTD

Winnetka, IL · 60093

312-553-6940

Laura A. McJilton

Reg. 74378

Patent agent

Evenston, IL · 60202

John J McKearin

Reg. 59116

Patent agent

Hoffman Estates, IL · 60169

847-884-4933

Janice M McLain

Reg. 32367

Patent attorney

Tinley Park, IL · 60477

708-614-0372

F William McLaughlin

Reg. 32273

Patent attorney

Wood Phillips

Chicago, IL · 60661

312-876-2120

Neil B McLaughlin

Reg. 70810

Patent attorney

Rakoczy Molino Mazzochi Siwik LLP

Chicago, IL · 60654

312-222-7241

Charles M McMahon

Reg. 44926

Patent attorney

McDermott Will & Emery LLP

Chicago, IL · 60606

312-984-7641

Michelle L McMullen

Reg. 52016

Patent attorney

Polsinelli PC

Chicago, IL · 60606

312-463-6303

John R McNair

Reg. 78506

Patent attorney

Winston & Strawn LLP

Chicago, IL · 60601-9703

312-558-3225

Dennis M McWilliams

Reg. 25195

Patent attorney

Barnes & Thornburg LLP

Chicago, IL · 60690-2786

312-214-4801

James B Medek

Reg. 70845

Patent attorney

Kirkland & Ellis, LLP

Chicago, IL · 60654

312-862-2000

Adrian Mederos

Reg. 77151

Patent agent

Arlington Heights, IL · 60005

305-607-9841

Sarah T. Meece

Reg. 84108

Patent agent

Burr Ridge, IL · 60527

630-247-8303

Timothy Colin Meece

Reg. 38553

Patent attorney

Banner and Witcoff, Ltd.

Chicago, IL · 60606

312-463-5000

Harold J. Meerbaum

Reg. 59753

Patent attorney

Greer, Burns & Crain, Ltd.

Chicago, IL · 60606-6771

312-360-0080

Richard Burns Megley· Jr

Reg. 41992

Patent attorney

Glenview, IL · 60026

847-834-0438

Raymond Melvin Mehler

Reg. 26306

Patent attorney

Cook Alex Ltd.

Chicago, IL · 60606

312-236-8500

Hersh H Mehta

Reg. 62336

Patent attorney

Morgan, Lewis & Bockius LLP

Chicago, IL · 60601

312-324-1739

Manish K. Mehta

Reg. 64570

Patent attorney

Benesch Friedlander Coplan & Aronoff LLP

Chicago, IL · 60606

312-212-4953

Rachel J Mejdrich

Reg. 53477

Patent agent

Leydig Voit and Mayer Ltd

Chicago, IL · 60601

312-616-5600

August M Melcher

Reg. 78644

Patent attorney

Locke Lord LLP

Chicago, IL · 60606

952-221-3136

Emily C. Melvin

Reg. 66586

Patent attorney

Latham & Watkins LLP

Chicago, IL · 60611

312-876-7700

Vicki S Menard

Reg. 38554

Patent attorney

March & McLennan Companies

Vernon Hills, IL · 60061

847-549-4849

Alejandro Menchaca

Reg. 34389

Patent attorney

McAndrews Held and Malloy LTD

Chicago, IL · 60661

312-775-8000

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?

2,889 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.