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 Marshall, Gerstein & Borun LLP, HERE North America, LLC, and Northwestern Pritzker School of Law.

Top cities in Illinois

All practitioners in Illinois

Adil M Musabji

Reg. 58728

Patent attorney

HERE North America, LLC

Chicago, IL · 60606

312-208-4155

Katie B Musial

Reg. 902883

Limited recognition

Northwestern Pritzker School of Law

Chicago, IL · 60611

702-460-3284

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

Adrienne B Naumann

Reg. 33744

Patent attorney

Law Office Of Adrienne B Naumann

Skokie, IL · 60076

847-329-8185

Steven T Naumann

Reg. 33745

Patent attorney

Skokie, IL · 60076

708-404-6829

Erica Navar

Reg. 61711

Patent attorney

POLSINELLI PC

Chicago, IL · 60606

312-819-1900

Richard E Nawracaj

Reg. 52495

Patent attorney

Entwistle and Cappucci LLC

Chicago, IL · 60606

312-474-7976

Christopher P Neahring

Reg. 53373

Patent agent

Chicago, IL · 60690

312-451-8897

Matthew J. Nealon

Reg. 82378

Patent attorney

Marshall, Gerstein & Borun LLP

Chicago, IL · 60606-6357

312-423-3453

Shannon L Nebolsky

Reg. 41217

Patent attorney

Pioneer Patent, LLC

Northbrook, IL · 60062

847-412-0073

Maurine J Neiberg

Reg. 44965

Patent attorney

River Forest, IL · 60305

708-771-2186

Cameron M Nelson

Reg. 55486

Patent attorney

Greenberg Traurig, P.C.

Chicago, IL · 60601-4904

312-456-6590

Jon O Nelson

Reg. 24566

Patent attorney

Banner and Witcoff LTD

Chicago, IL · 60606

312-463-5000

Thomas E Nemo

Reg. 33982

Patent attorney

Naperville, IL · 60563

630-961-0930

Lydia N Nenow

Reg. 52530

Patent attorney

AbbVie Inc.

North Chicago, IL · 60064

847-938-0389

John F Nethery

Reg. 42928

Patent attorney

Brinks Gilson & Lione

Chicago, IL · 60611

312-321-4200

Katherine L Neville

Reg. 53379

Patent agent

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.