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 Faegre Drinker Biddle & Reath LLP, KLINTWORTH & ROZENBLAT IP LLP, and Greer, Burns & Crain, LTD..

Top cities in Illinois

All practitioners in Illinois

Evan J Kline-Wedeen

Reg. 75464

Patent attorney

Faegre Drinker Biddle & Reath LLP

Chicago, IL · 60606

312-569-1108

Timothy Keith Klintworth

Reg. 46162

Patent attorney

KLINTWORTH & ROZENBLAT IP LLP

Chicago, IL · 60607

773-570-3332

Peter M Klobuchar

Reg. 43722

Patent attorney

Greer, Burns & Crain, LTD.

Chicago, IL · 60606

312-360-0080

John Wilson Klooster

Reg. 18953

Patent attorney

Lake Forest, IL · 60045-4210

847-295-1371

Jerome Bernard Klose

Reg. 17104

Patent attorney

Olympia Fields, IL · 60461

708-748-9198

Paul S Kmett

Reg. 70351

Patent agent

Springfield, IL · 62711

217-341-1832

Thomas A Kmiotek

Reg. 30075

Patent attorney

Naperville, IL · 60563

630-416-9823

David M. Knapp

Reg. 75280

Patent attorney

Freeborn & Peters LLP

Chicago, IL · 60606

312-360-6320

Michael J Knick

Reg. 51002

Patent attorney

Michael Knick, LLC

Joliet, IL · 60431

815-954-9469

Casey A Kniser

Reg. 57461

Patent attorney

Casey A Kniser

Chicago, IL · 60602

312-771-3194

Jay Q Knobloch

Reg. 57347

Patent attorney

Trading Technologies International, Inc.

Chicago, IL · 60606

312-476-1000

Jeffrey Gerard Knoll

Reg. 34643

Patent attorney

Cummins-Allison CORP

MT Prospect, IL · 60056

847-759-6207

Stephen A Kobza

Reg. 69916

Patent attorney

Circuit Court of Cook County, Law Division

Chicago, IL · 60602

312-603-2687

Douglas M Kochelek

Reg. 66722

Patent attorney

Chicago, IL · 60605

314-458-4696

Stephen Richard Koenig

Reg. 50616

Patent agent

Chicago, IL · 60645-4702

312-307-7286

Luke P Koenigsknecht

Reg. 82718

Patent agent

McDonnell Boehnen Hulbert & Berghoff LLP

Chicago, IL · 60606

312-913-0004

Jacob D Koering

Reg. 51890

Patent attorney

Miller, Canfield, Paddock & Stone PLC

Chicago, IL · 60606

312-460-4272

Rebecca R Kohn

Reg. 52855

Patent attorney

Lincolnwood, IL · 60712

212-336-8139

Rathna Rajanala Koka

Reg. 74560

Patent attorney

JP Morgan

Chicago, IL · 60603

312-732-5374

Michael T Kokal

Reg. 75360

Patent attorney

Heyl, Royster, Voekler & Allen

Springfield, IL · 62711

217-522-8822

Sydney R Kokjohn

Reg. 63868

Patent attorney

McDonnell Boehnen Hulbert & Berghoff, LLP

Chicago, IL · 60606-6709

312-913-3304

Khadijat A. Kokumo

Reg. 83122

Patent agent

Foley & Lardner LLP

Chicago, IL · 60654

312-832-4527

Laura L Kolb

Reg. 57438

Patent attorney

Sidley Austin LLP

Chicago, IL · 60603

312-853-9983

Taylor J Kolb

Reg. 74057

Patent agent

Chicago, IL · 60657

920-858-8432

Paul J. Kolbeck

Reg. 62663

Patent agent

Downers Grove, IL · 60515

630-963-7467

Brett D Kolditz

Reg. 70550

Patent attorney

Peoria, IL · 61614

724-565-3489

Ludwig Edward Kolman

Reg. 32473

Patent attorney

Vedder Price PC

Chicago, IL · 60601

312-609-7500

Michael F Kolman

Reg. 54234

Patent attorney

BP America Inc.

Naperville, IL · 60563

630-420-3731

Andrew George Kolomayets

Reg. 33723

Patent attorney

Cook Alex LTD.

Chicago, IL · 60606

312-236-8500

Damyan N. Kolomayets

Reg. 80989

Patent attorney

Cook Alex Ltd.

Chicago, IL · 60606

312-236-8500

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.