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 The Law Offices of Eugene M. Cummings, P.C., McDonnell Boehnen Hulbert & Berghoff, and Duane Morris LLP.

Top cities in Illinois

All practitioners in Illinois

David M Mundt

Reg. 41207

Patent attorney

The Law Offices of Eugene M. Cummings, P.C.

Chicago, IL · 60606

312-984-0144

Alberto Munoz

Reg. 84809

Patent agent

McDonnell Boehnen Hulbert & Berghoff

Chicago, IL · 60606

312-935-2357

John E Munro

Reg. 66864

Patent attorney

Duane Morris LLP

Chicago, IL · 60603

312-499-6786

Herbert F Munsterman

Reg. 40740

Patent attorney

Herbert F. Munsterman

Hoffman Estates, IL · 60192

847-778-6130

James P Muraff

Reg. 39785

Patent attorney

McDonald Hopkins LLC

Chicago, IL · 60654

312-371-6265

Dennis S Murphy

Reg. 54328

Patent agent

Libertyville, IL · 60048

847-752-4766

James P Murphy

Reg. 40741

Patent attorney

McAndrews Held & Malloy, Ltd

Chicago, IL · 60661

312-775-8000

Jeremy E. Murphy

Reg. 81520

Patent attorney

Troutman Pepper Locke LLP

Chicago, IL · 60606

312-443-0546

Leonard Edward Murphy

Reg. 37894

Patent attorney

Property Loss Research Bureau

Downers Grove, IL · 60515-1291

630-724-2213

Mark J Murphy

Reg. 34225

Patent attorney

HuschBlackwell LLP

Chicago, IL · 60606

312-526-1533

Adrian J Murray

Reg. 44251

Patent agent

Brinks Gilson & Lione

Chicago, IL · 60611

312-321-4229

Brian J Murray

Reg. 48934

Patent attorney

Glen Ellyn, IL · 60137

312-782-3939

Daniel Allen Murray

Reg. 37195

Patent attorney

Wilmette, IL · 60091

847-920-9042

Navaneeth K. Murthy

Reg. 81099

Patent agent

Chicago, IL · 60607

972-835-9711

Sanjay Krishna Murthy

Reg. 45976

Patent attorney

Taft Stettinius & Hollister LLP

Chicago, IL · 60601

312-966-8576

Adil M Musabji

Reg. 58728

Patent attorney

HERE North America, LLC

Chicago, IL · 60606

312-208-4155

James B Muskal

Reg. 22797

Patent attorney

Leydig, Voit and Mayer LTD

Chicago, IL · 60601

312-616-5600

Carl E Myers

Reg. 62186

Patent attorney

The Law Offices of Carl E. Myers

Chicago, IL · 60601

312-267-0406

Jennifer V Nacht

Reg. 82833

Patent attorney

Greer, Burns & Crain, Ltd

Chicago, IL · 60606

312-360-0080

Vera A. Nackovic

Reg. 59388

Patent attorney

Mayer, Brown, Rowe & Maw

Chicago, IL · 60606

312-701-8115

Himani S. Nadgauda

Reg. 75917

Patent agent

Michael Best & Friedrich LLP

Chicago, IL · 60606

312-596-5855

Marsha Ferziger Nagorsky

Reg. 41743

Patent attorney

University Of Chicago Law School

Chicago, IL · 60637

773-834-5958

Dickran J Nahikian

Reg. 60041

Patent attorney

Nahikian Global IP & Tech Group

Chicago, IL · 60614

312-399-3099

Mark John Nahnsen

Reg. 51093

Patent attorney

Barnes & Thornburg LLP

Chicago, IL · 60690-2786

312-357-1313

Timothy P. Naill

Reg. 70492

Patent attorney

Rockford, IL · 61107

815-633-5300

Margaux L Nair

Reg. 68897

Patent attorney

Mars Wrigley

Chicago, IL · 60642

773-712-8674

James J Napoli

Reg. 32361

Patent attorney

Marshall, Gerstein & Borun LLP

Chicago, IL · 60606

312-474-6300

Steven A Nash

Reg. 45507

Patent attorney

Xellia Pharmaceuticals

Buffalo Grove, IL · 60089

224-645-5912

Muhammad A Nasir

Reg. 54909

Patent agent

Chicago, IL · 60601

312-946-1552

James P Naughton

Reg. 30665

Patent attorney

Crowell & Moring LLP

Chicago, IL · 60611

312-321-4723

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.