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 Marshall, Gerstein & Borun LLP, Law Office Of Adrienne B Naumann, and POLSINELLI PC.

Top cities in Illinois

All practitioners in Illinois

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

Damon G Newman

Reg. 73629

Patent attorney

Chicago, IL · 60640

773-439-0271

Gerald M Newman

Reg. 24024

Patent attorney

Schoenberg Finkel Newman and Rosenberg LTC

Chicago, IL · 60606

312-648-2300

Jordan A Newmark

Reg. 50904

Patent agent

Cboe Global Markets, Inc.

Chicago, IL · 60605

312-786-7344

Valerie R Neymeyer-Tynkov

Reg. 46956

Patent attorney

Positive Patents LLC

Chicago, IL · 60602

131-296-51969

Sao Mai Nguyen-Mau

Reg. 77925

Patent agent

Chicago, IL · 60606

872-221-2833

Sharon K. Ngwenya

Reg. 81320

Patent agent

Klintworth & Rozenblat LLP

Chicago, IL · 60612-1577

678-438-3850

Sarfaraz K Niazi

Reg. 52067

Patent agent

Pharmaceutical Scientist Inc.

Deerfield, IL · 60015

312-297-0000

Frank C Nicholas

Reg. 33983

Patent attorney

Cardinal Law GRP

Evanston, IL · 60201

847-424-2521

G Peter Nichols

Reg. 34401

Patent attorney

Barnes & Thornburg LLP

Chicago, IL · 60606-2833

312-214-4832

Jeffrey Clyde Nichols

Reg. 36879

Patent attorney

Baxter Healthcare Corporation

Deerfield, IL · 60015

224-948-4922

Jeffry M Nichols

Reg. 46958

Patent attorney

Crowell & Moring

Chicago, IL · 60611

312-321-4200

Matthew C Nielsen

Reg. 51106

Patent attorney

Marshall, Gerstein & Borun LLP

Chicago, IL · 60606

312-474-6300

Vivien Chen Nielsen

Reg. 62514

Patent attorney

Astellas US LLC

Northbrook, IL · 60026

224-205-5225

Allan J. Niemerg

Reg. 61655

Patent attorney

Richards Patent Law

Chicago, IL · 60606

312-613-9416

Peter D Nigrelli

Reg. 66461

Patent agent

Banner & Witcoff, Ltd.

Chicago, IL · 60606

312-463-5425

Andrew F Nilles

Reg. 47825

Patent attorney

Archer Daniels Midland Company

Decatur, IL · 62526

217-451-2777

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.