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 McDonnell Boehnen Hulbert & Berghoff LLP, Nokia Solutions and Networks, and Azul 3D.

Top cities in Illinois

All practitioners in Illinois

Antonio M. Posa

Reg. 81338

Patent agent

Azul 3D

Skokie, IL · 60076

248-946-1666

James William Potthast

Reg. 26792

Patent attorney

Law Offices Of Potthast and Associates

Woodstock, IL · 60098

773-404-6650

James Burgess Potts

Reg. 58316

Patent attorney

Chicago, IL · 60618

571-228-5516

John P Poulos

Reg. 72551

Patent attorney

Norton Rose Fulbright US LLP

Chicago, IL · 60607

312-964-7766

Harrison R. Powell

Reg. 82468

Patent agent

Delta Theta Technologies

Chicago, IL · 60614

901-355-9850

Daniel C Pozdol

Reg. 71391

Patent attorney

McDonnell Boehnen Hulbert & Berghoff LLP

Chicago, IL · 60606

312-913-3303

Thomas K Pratt

Reg. 37210

Patent attorney

Banner Witcoff

Chicago, IL · 60606

312-463-5436

April A Price

Reg. 63637

Patent attorney

Deere & Company

Moline, IL · 61265

309-748-8203

Bradford Rodney Lee Price

Reg. 29101

Patent attorney

Baxter Healthcare Corporation

Deerfield, IL · 60015

224-948-4483

Phyllis Yvonne Price

Reg. 34234

Patent attorney

Law Office of Phyllis Price

Chicago, IL · 60602

312-379-0044

Sean T. Price

Reg. 72259

Patent attorney

Northwestern University

Evanston, IL · 60208

847-467-1094

Carey J Prill

Reg. 69402

Patent attorney

AbbVie Inc.

North Chicago, IL · 60064

847-651-2298

Jordan J Pringle

Reg. 67673

Patent attorney

McDonnell Boehnen Hulbert & Berghoff LLP

Chicago, IL · 60606-6709

312-913-0001

Patricia Lombardo Prior

Reg. 33758

Patent attorney

Greer Burns & Crain Ltd

Chicago, IL · 60606

312-360-0080

James Stanley Pristelski

Reg. 27222

Patent attorney

Huntley, IL · 60142

847-867-6994

Philip A Prorok

Reg. 67548

Patent attorney

Argo Group US, Inc.

Chicago, IL · 60606

847-404-1703

Jeremy D. Protas

Reg. 61681

Patent attorney

Marshall, Gerstein & Borun LLP

Chicago, IL · 60606

312-474-6300

Nicholas C Pruhs

Reg. 52136

Patent attorney

Wallenstein and Wagner LTD

Chicago, IL · 60606

312-554-3300

Serena Jean Pruitt

Reg. 55212

Patent attorney

Kirkland & Ellis LLP

Chicago, IL · 60654

312-862-2000

Cary M Pumphrey

Reg. 56719

Patent attorney

Senior Attorney, Intellectual Property

Deerfield, IL · 60015

847-315-4582

Rebecca L Pumphrey

Reg. 53713

Patent attorney

Nokia Solutions and Networks

Arlington Heights, IL · 60004

847-532-8067

Umair A Qadeer

Reg. 54380

Patent agent

Hojka Qadeer, LLC

Chicageo, IL · 60601

312-248-3020

Yi Qiao

Reg. 69160

Patent agent

Nokia Solutions and Networks

Arlington Heights, IL · 60004

847-532-8020

Henry C Query· Jr

Reg. 35650

Patent attorney

Henry Query, P.C.

Wheaton, IL · 60187

630-260-8093

Kelly B Quinn

Reg. 67150

Patent agent

Chicago, IL · 60605

989-493-0191

Sean P Quinn

Reg. 73974

Patent attorney

SPQ IP LLC

Wheaton, IL · 60187

312-620-6289

Lauren T Rabinovic

Reg. 45605

Patent attorney

GLS Capital

Chicago, IL · 60606-1598

224-668-4632

Brian A. R. Raddatz

Reg. 81010

Patent attorney

Caterpillar Inc.

Peoria, IL · 61629-7310

555-555-1234

Bradley F Rademaker

Reg. 35331

Patent attorney

Neal, Gerber & Elsenberg, LLP,

Chicago, IL · 60602

312-269-8037

James B Raden

Reg. 24594

Patent attorney

Highland Park, IL · 60035-3590

847-433-7090

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.