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 Marshall, Gerstein & Borun LLP, Greenberg Traurig, LLP, and Molex.

Top cities in Illinois

All practitioners in Illinois

Jeffrey K Jacobs

Reg. 44798

Patent attorney

Molex

Lisle, IL · 60532

630-718-5522

Robert S Jacobson

Reg. 77550

Patent agent

Marshall, Gerstein & Borun LLP

Chicago, IL · 60606-6357

312-423-3432

Kenneth Edward Jaconetty

Reg. 32508

Patent attorney

Takeda Pharmaceuticals U.S.A.

Deerfield, IL · 60015

224-554-5494

Jerold Alan Jacover

Reg. 26284

Patent attorney

Foley & Laroner

Chicago, IL · 60654-5313

312-832-5117

Herve R Jacquiau

Reg. 64976

Patent attorney

Hahn Losser & Parks LLP

Chicago, IL · 60606

312-637-3022

James Joseph Jagoda

Reg. 33250

Patent attorney

Bishop Diehl & Lee, Ltd.

Schaumburg, IL · 60173

847-969-9123

Kraig A Jakobsen

Reg. 64520

Patent attorney

Saint Charles, IL · 60175

630-360-9200

Robert Vernon Jambor

Reg. 23080

Patent attorney

Leydig, Voit & Mayer, LTD

Chicago, IL · 60601

312-616-5600

Joshua H. James

Reg. 72568

Patent attorney

Crowell & Moring

Chicago, IL · 60654

312-840-3270

Lawrence E James· Jr.

Reg. 63695

Patent attorney

Reed Smith, LLP

Chicago, IL · 60606

312-207-2819

Thomas A James

Reg. 74109

Patent attorney

Orrick Herrington & Sutcliffe LLP

Chicago, IL · 60654

312-924-9805

Qasim S. Jami

Reg. 62899

Patent attorney

McDermott Will & Emery LLP

Chicago, IL · 60606

312-372-2000

Jessica Jamieson

Reg. 52483

Patent attorney

Baxalta US Inc.

Bannockburn, IL · 60015

224-940-3859

Joseph F Janas

Reg. 69864

Patent attorney

Foley & Lardner LLP

Chicago, IL · 60654

312-832-5171

David Francis Janci

Reg. 28620

Patent attorney

USG CORP

Libertyville, IL · 60048

847-970-5113

Steven Richard Janda

Reg. 33913

Patent agent

Caterpillar INC

Peoria, IL · 61629

309-675-5044

Kwangho Jang

Reg. 76690

Patent agent

Fish & Richardson P.C.

Chicago, IL · 60606

312-278-2611

Seung Hyun Jang

Reg. 75303

Patent agent

Lempia Summerfield Katz LLC

Chicago, IL · 60603

312-854-8370

Maitreya Paresh Jani

Reg. 47219

Patent attorney

Fortune Brands, Inc.

Deerfield, IL · 60015

847-484-4400

Jerome M Janicki

Reg. 66013

Patent agent

Hoffman Estates, IL · 60169

847-490-0116

John Charles Janka

Reg. 32996

Patent attorney

Nicro Scavone Haller & Niro

Chicago, IL · 60602

312-236-0733

Jeffrey E Janovetz

Reg. 72235

Patent agent

Peoria, IL · 61614

616-450-0628

Marlee A Jansen

Reg. 64677

Patent attorney

Hansen Reynolds Dickinson Crueger LLC

Chicago, IL · 60601

312-265-2252

John J. Jansky

Reg. 78193

Patent agent

Quarles and Brady LLP

Chicago, IL · 60606

312-715-5287

Lynn L Janulis

Reg. 53066

Patent attorney

Marshall, Gerstein & Borun LLP

Chicago, IL · 60606

312-474-6300

Michael Joseph Jaro

Reg. 34472

Patent attorney

Cardinal IP

Evanston, IL · 60201

707-292-7548

Gary Robert Jarosik

Reg. 35906

Patent attorney

Greenberg Traurig, LLP

Chicago, IL · 60601

312-456-8400

Keith R Jarosik

Reg. 47683

Patent attorney

Greenberg Traurig, LLP

Chicago, IL · 60607

312-456-8400

Larry Michael Jarvis

Reg. 27341

Patent attorney

McAndrews Held and Malloy

Chicago, IL · 60661

312-775-8000

Joseph T Jasper

Reg. 50833

Patent attorney

Hanley, Flight & Zimmerman, LLC

Chicago, IL · 60606

312-580-1020

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.