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 Crawford Intellectual Property Law LLC, Shure, Inc., and Sidley Austin Brown and Wood.

Top cities in Illinois

All practitioners in Illinois

Leah C. Cravitz

Reg. 82494

Patent agent

Chicago, IL · 60614

773-426-3214

Brie A Crawford

Reg. 58173

Patent attorney

Crawford Intellectual Property Law LLC

Barrington, IL · 60010

815-893-8149

Kerry T Creeron

Reg. 70004

Patent attorney

Shure, Inc.

Niles, IL · 60714

608-345-4935

Philip J Crihfield

Reg. 25621

Patent attorney

Sidley Austin Brown and Wood

Chicago, IL · 60603

312-853-7650

Alexandra E. Criner

Reg. 80076

Patent attorney

McDonnell Bohnen Hulbert & Berghoff

Chicago, IL · 60606

312-913-2139

Steven G. Criner

Reg. 82954

Patent agent

Honigman LLP

Chicago, IL · 60606

586-747-2753

Katelyn E. Crockett

Reg. 84546

Patent agent

Belleville, IL · 62220

618-402-6344

Harriet P Croke

Reg. 57858

Patent attorney

U. S. EPA Region 5

Chicago, IL · 50504

312-353-4789

Kevin G Croke

Reg. 57859

Patent agent

Evanston, IL · 60201

847-630-9584

Michael P Croke

Reg. 57158

Patent agent

Evanston, IL · 60201

847-869-3340

Mark William Croll

Reg. 31098

Patent attorney

Law Offices of Mark W. Croll

Chicago, IL · 60618

847-420-1005

Courtney Elizabeth Cronin

Reg. 76847

Patent attorney

Mayer Brown LLP

Chicago, IL · 60606

312-701-8755

John Robert Crossan

Reg. 27433

Patent agent

Chicago, IL · 60610-2465

312-498-2365

Lawrence E Crowe

Reg. 35110

Patent attorney

Lawrence E. Crowe, LLC

Loves Park, IL · 61111

815-885-3452

Steven Rodney Crowley

Reg. 31604

Patent agent

Grayslake, IL · 60030

847-894-7451

Michael T Cruz

Reg. 44636

Patent attorney

McAndrews Held and Malloy, Ltd.

Chicago, IL · 60661

312-775-8000

Kevin J Cukierski

Reg. 66717

Patent attorney

Signode Industrial Group LLC

Glenview, IL · 60026

847-657-4257

Kelly L Cummings

Reg. 39646

Patent attorney

Akzo Nobel Inc.

Chicago, IL · 60607

312-544-6925

Gary J Cunningham

Reg. 33488

Patent attorney

Motorola Mobility, LLC

Libertyville, IL · 60048

708-525-4666

Joseph P Curcuru

Reg. 78260

Patent agent

International Business Machines (IBM)

Chicago, IL · 60606

312-529-1339

Alvaro Cure Dominguez

Reg. 81532

Patent attorney

Chicago, IL · 60639

786-856-4880

John M Curley

Reg. 62946

Patent agent

Naperville, IL · 60540

630-420-0036

Gianni L Cutri

Reg. 52791

Patent attorney

Kirkland & Ellis LLP

Chicago, IL · 60654

312-862-2000

Joseph T Cygan

Reg. 50937

Patent attorney

Cygan Law Offices, P.C.

Schaumburg, IL · 60195

847-973-5246

Daniel M D'Addario

Reg. 73640

Patent attorney

Chicago, IL · 60661

347-256-0732

David L. D'Amato

Reg. 74497

Patent attorney

Zebra Technologies Corp.

Lincolnshire, IL · 60069

201-315-9441

Mark Allan Dalla Valle

Reg. 34147

Patent attorney

Winnetka, IL · 60093

408-884-1510

Christopher R. Dalton

Reg. 67931

Patent agent

Independent

Mundelein, IL · 60060

224-358-6084

Kevin T. Dam

Reg. 70982

Patent attorney

Banner & Witcoff, Ltd.

Chicago, IL · 60606-7407

312-463-5000

Thomas M DaMario· Jr.

Reg. 77142

Patent attorney

Benesch Friedlander Coplan & Aronoff LLP

Chicago, IL · 60606

312-506-3436

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.