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 Arch & Lake LLP, K&L Gates LLP, and jiangipllc.

Top cities in Illinois

All practitioners in Illinois

Shaum B. Jhansale

Reg. 64607

Patent attorney

Chicago, IL · 60640

773-620-4100

Zhangyuan Ji

Reg. 800046

Limited recognition

Arch & Lake LLP

Chicago, IL · 60601

773-680-9572

Jian Jiang

Reg. 69127

Patent attorney

K&L Gates LLP

Chicago, IL · 60602

312-807-4406

Yanling Jiang

Reg. 76136

Patent attorney

jiangipllc

chicago, IL · 60604

630-733-9483

Yiwei Jiang

Reg. 78350

Patent attorney

Chicago, IL · 60611

630-730-6572

Panasarn Aim Jirut

Reg. 51849

Patent attorney

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

Chicago, IL · 60606

312-984-0144

Laura E Johannes

Reg. 69914

Patent attorney

AbbVie, Inc.

North Chicago, IL · 60064

847-936-7868

Michael Braker Johannesen

Reg. 35557

Patent attorney

Glen Ellyn, IL · 60137-6133

630-430-1502

Anne M Johnson

Reg. 45633

Patent agent

Arlington Heights, IL · 60004

847-253-2506

Bradley D. Johnson

Reg. 66579

Patent attorney

Dunlap, IL · 61525

214-399-4300

Craig A Johnson

Reg. 44172

Patent attorney

c/o CEFCU Compliance

Peoria, IL · 61656

+41-228-494204

Frank L. Johnson

Reg. 69969

Patent attorney

Leydig, Voit & Mayer, Ltd.

Chicago, IL · 60601

312-616-5600

Harold V Johnson

Reg. 31972

Patent attorney

Brinks Gilson & Lione

Chicago, IL · 60611

312-321-4200

Katherine H Johnson

Reg. 72199

Patent attorney

Steptoe & Johnson LLP

Chicago, IL · 60606

312-577-1300

Lars Steven Johnson

Reg. 33404

Patent attorney

Naperville, IL · 60540

630-303-1722

Mark K Johnson

Reg. 39719

Patent attorney

Western Springs, IL · 60558

708-214-8644

Robert C. Johnson

Reg. 79836

Patent agent

Marshall Gerstein & Borun LLP

Chicago, IL · 60606

312-423-3464

Nicholas A. Johnston

Reg. 82251

Patent attorney

Kirkland & Ellis, LLP

Chicago, IL · 60654

312-862-4214

Richard B Johnston

Reg. 41097

Patent attorney

Cook Alex Ltd

Chicago, IL · 60606

312-334-8547

Trevor B Joike

Reg. 25542

Patent attorney

Schiff Hardin LLP

Chicago, IL · 60606

312-258-5774

Chipo M Jolibois

Reg. 54201

Patent attorney

Abbott Laboratories

Abbott Park, IL · 60064

224-331-9871

Jollene M Jones

Reg. 41877

Patent attorney

Lindenhurst, IL · 60046

847-245-4027

Kimberlee M Jones

Reg. 60173

Patent agent

Jones Legal Advisors PLLC

Chicago, IL · 60601

312-600-3201

Shyla N. Jones

Reg. 71648

Patent attorney

Charles Schwab and Co.

Chicago, IL · 60606

630-334-0138

Matthew M Jorge

Reg. 66014

Patent attorney

Marshall, Gerstein & Borun LLP

Chicago, IL · 60606-6357

312-474-6300

Justin Tyler Joseph

Reg. 77437

Patent attorney

Greer, Burns & Crain, Ltd.

Chicago, IL · 60606

630-877-6388

J Kenneth Joung

Reg. 41881

Patent attorney

UOP LLC

Des Plaines, IL · 60017

847-391-2004

Mark Joy

Reg. 35562

Patent attorney

Leydig Voit and Mayer, Ltd.

Chicago, IL · 60601

312-616-5600

Karolina D. Jozwiak

Reg. 81930

Patent attorney

Medinah, IL · 60157

630-550-6567

Paul Gerard Juettner

Reg. 30270

Patent attorney

Greer Burns and Crain, Ltd.

Chicago, IL · 60606

312-360-0080

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.