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, Faier & Faier P.C., and Caterpillar Inc..

Top cities in Illinois

All practitioners in Illinois

Andrew M Everest

Reg. 44674

Patent attorney

Chicago, IL · 60647

773-772-1500

Kelsey Anne Ewing

Reg. 78303

Patent attorney

Caterpillar Inc.

Peoria, IL · 61529

706-641-5393

Jody L Factor

Reg. 34157

Patent attorney

Factor Intellectual Property Law Group, Ltd.

Chicago, IL · 60607

312-226-1818

Robin S Fahlberg

Reg. 50393

Patent attorney

State Farm Mutual Automobile Insurance Co.

Bloomington, IL · 61710

309-243-1500

Brian G. Fahrenbach

Reg. 72603

Patent attorney

Rakoczy Molino Mazzochi Siwik LLP

Chicago, IL · 60654

312-222-7208

Jill A Fahrlander

Reg. 42518

Patent attorney

Valauskas Corder LLC

Chicago, IL · 60606

312-673-0360

Adam J Faier

Reg. 56898

Patent attorney

McDonnell Boehnen Hulbert & Berghoff LLP

Chicago, IL · 60606

312-913-2123

James M Faier

Reg. 56731

Patent attorney

Faier & Faier P.C.

Chicago, IL · 60661

312-382-9400

Martin M Faier

Reg. 20294

Patent attorney

Faier & Faier P.C.

Chicago, IL · 60661

312-382-9500

Katy C Fain

Reg. 42520

Patent attorney

Trilla, IL · 62469-2112

217-656-7191

Jeffery N Fairchild

Reg. 37825

Patent agent

Klein Tools

Lincolnshire, IL · 60069

847-821-5549

Thomas A Fairhall

Reg. 34591

Patent attorney

McDonnell Boehnen Hulbert & Berghoff LLP

Chicago, IL · 60606

312-913-0001

Christine A Falaschetti

Reg. 73286

Patent agent

Chicago, IL · 60614

815-671-7353

Steven P Fallon

Reg. 35132

Patent attorney

Greer Burns and Crain, LTD.

Chicago, IL · 60606

312-360-0080

Weidan Fan

Reg. 74304

Patent agent

Leydig, Voit & Mayer, LTD

Chicago, IL · 60601-6731

312-616-5749

Harold J Fassnacht

Reg. 35507

Patent attorney

Miller Matthias & Hull LLP

Chicago, IL · 60606

312-235-4765

Stephen S Favakeh

Reg. 36798

Patent attorney

Fitch, Even, Tabin & Flannery, LLP

Chicago, IL · 60603-3406

312-577-7000

Michael A. Febbo

Reg. 59205

Patent attorney

Hewlett-Packard Company

Chicago, IL · 33121

331-214-6446

Scott Bennett Feder

Reg. 33129

Patent attorney

Locke Lord LLP

Chicago, IL · 60606-4410

312-443-0497

Aaron R. Feigelson

Reg. 59022

Patent attorney

Leydig, Voit & Mayer, Ltd.

Chicago, IL · 60601

312-616-5600

Mark E Fejer

Reg. 34817

Patent attorney

Glenview, IL · 60025

847-729-7018

Jacqueline J Felda

Reg. 69622

Patent attorney

Marshall, Gerstein and Borun, LLP

Chicago, IL · 60606

312-474-6300

Mitchell M. Feldhake

Reg. 79902

Patent attorney

Willkie Farr & Gallagher

Chicago, IL · 60654

312-728-9051

Mark I Feldman

Reg. 26880

Patent attorney

DLA Piper LLP

Chicago, IL · 60601

312-368-7084

Steven Eric Feldman

Reg. 40604

Patent attorney

Hahn Loeser & Parks, LLP

Chicago, IL · 60606

312-637-3010

Stephanie J Felicetty

Reg. 50814

Patent attorney

Wm. Wrigley Jr. Company

Chicago, IL · 60642

312-794-6436

Wallace H. Feng

Reg. 78304

Patent attorney

Leydig Voit and Mayer, Ltd.

Chicago, IL · 60601

312-616-5600

Yuezhong Feng

Reg. 58657

Patent attorney

Brinks Gilson & Lione

Chicago, IL · 60611

312-321-4200

Kevin Patrick Ferguson

Reg. 51043

Patent attorney

Motorola Solutions

Chicago, IL · 60661

475-559-4991

Robert M. Fernandes

Reg. 79887

Patent attorney

Taft Stettinius & Hollister LLP

Chicago, IL · 60601

312-840-4372

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.