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 Northwestern Pritzker School of Law, Norton Rose Fulbright US LLP, and Knowles Corporation.

Top cities in Illinois

All practitioners in Illinois

Jiang Wu

Reg. 79165

Patent attorney

Norton Rose Fulbright US LLP

Chicago, IL · 60607

312-964-7764

Qianhong H Wu

Reg. 63583

Patent agent

Naperville, IL · 60564

630-922-1468

Richard A Wulff

Reg. 42238

Patent attorney

Knowles Corporation

Itasca, IL · 60143

630-250-5908

Daniel Q Wybenga

Reg. 68961

Patent attorney

Chicago Board of Options Exchange

Chicago, IL · 60605

803-840-213

Henry X. Xu

Reg. 84058

Patent agent

Marshall, Gerstein, and Borun LLP

Chicago, IL · 60606

312-423-3447

James Xu

Reg. 60456

Patent attorney

Chicago, IL · 60602

312-388-6988

Wei Yan

Reg. 68176

Patent attorney

Quarles & Brady LLP

Chicago, IL · 60606

312-715-5027

Zhonghao Yan

Reg. 84361

Patent agent

Chicago, IL · 60607

984-888-7208

Jie Yang

Reg. 77665

Patent attorney

Chicago, IL · 60602

630-777-2713

Oliver D Yang

Reg. 68682

Patent attorney

Vitale, Vickrey, Niro, Solon & Gasey LLP

Chicago, IL · 60606

312-236-0733

Joey C. Yao

Reg. 63810

Patent attorney

McDonnell Boehnen Hulbert & Berghoff LLP

Chicago, IL · 60606

312-913-0001

Paul David Yasger

Reg. 37477

Patent attorney

Abbott Laboratories

Abbott Park, IL · 60064-6008

847-938-3508

Thomas A Yassen

Reg. 35005

Patent attorney

BP America, Inc.

Naperville, IL · 60563

630-420-5853

Jun Ye

Reg. 74777

Patent attorney

Getech Law LLC

Chicago, IL · 60601

267-393-2299

Rebecca Diane Yeisley

Reg. 47196

Patent agent

Rebecca D. Yeisley

Champaign, IL · 61825

858-232-7230

Christopher D Yellick

Reg. 61243

Patent agent

Chicago, IL · 60657

312-627-2623

Patcharin Yeung

Reg. 60404

Patent attorney

Cardinal Intellectual Property

Evanston, IL · 60201

847-859-3030

Tin-Chuen Yeung

Reg. 40240

Patent agent

Everest International, Inc.

Northbrook, IL · 60062

847-509-1003

Jason S Yi

Reg. 58493

Patent attorney

Niles, IL · 60714

847-824-7443

Zi Yie

Reg. 80066

Patent attorney

Faegre Drinker Biddle & Reath LLP

Chicago, IL · 60606

312-356-5019

Hongya Yin

Reg. 902888

Limited recognition

Northwestern Pritzker School of Law

Chicago, IL · 60611

312-918-8170

Il Hwan Yoo

Reg. 78275

Patent attorney

Crowell & Moring LLP

Chicago, IL · 60611

312-840-3297

Kayla York

Reg. 903112

Limited recognition

Northwestern Pritzker School of Law

Chicago, IL · 60611

708-969-0169

Qiuchen York

Reg. 83840

Patent agent

Lindenhurst, IL · 60046

346-275-8242

Michele J Young

Reg. 43299

Patent attorney

SF Home Decor, LLC

Wheeling, IL · 60090

508-667-5280

Richard W Young

Reg. 30706

Patent attorney

Winnetka, IL · 60093

847-610-0915

David J. Youngkin

Reg. 77083

Patent attorney

Integrated DNA Technologies, Inc.

Evanston, IL · 60201

847-745-1687

Steven Yovits

Reg. 48055

Patent attorney

Kelley Drye & Warren LLP

Chicago, IL · 60606

312-857-7099

Andrea Alaine F Yu

Reg. 62359

Patent agent

Bartlett, IL · 60103

630-483-8256

Michael Yu

Reg. 69056

Patent attorney

Deere & Company

Moline, IL · 61265

309-765-9975

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.