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, Numat Technologies, and Barack Ferrazzano Kirschbaum & Nagelberg.

Top cities in Illinois

All practitioners in Illinois

Karen L Blouin

Reg. 57098

Patent attorney

Numat Technologies

Chicago, IL · 60651

847-929-4186

David H Bluestone

Reg. 44542

Patent attorney

Barack Ferrazzano Kirschbaum & Nagelberg

Chicago, IL · 60606

312-984-3106

Donna I Bobrowicz

Reg. 32196

Patent attorney

Lombard, IL · 60148

773-960-1805

Danielle A. Bochneak

Reg. 64999

Patent attorney

Seyfarth Shaw LLP

Chicago, IL · 60603

312-339-5974

Joel H Bock

Reg. 29045

Patent attorney

Cook Alex Ltd.

Chicago, IL · 60606

312-236-8500

Roberto M. Bode

Reg. 72938

Patent attorney

Chicago, IL · 60646

786-548-9466

Douglas A Boehm

Reg. 32014

Patent attorney

Hanover Park, IL · 60133

571-272-1000

Lindsay E Boehme

Reg. 84383

Patent agent

Fitch, Even, Tabin & Flannery, LLP

Chicago, IL · 60603

312-577-7000

Daniel A Boehnen

Reg. 28399

Patent attorney

McDonnell Boehnen Hulbert & Berghoff LLP

Chicago, IL · 60606

312-913-0001

Stefan Bogaerts

Reg. 48503

Patent agent

Homewood, IL · 60430

708-957-8870

Ethan E Bogenrief

Reg. 52517

Patent attorney

State Of Illinois Appellate Court

Elmhurst, IL · 60126

847-530-1735

Adnan Hussain Bohri

Reg. 62648

Patent attorney

Cardinal Health

Chicago, IL · 60606

312-270-2001

Mary Jo Boldingh

Reg. 34713

Patent attorney

Paschall & Associates, LLC

Arlington Heights, IL · 60004

872-810-2997

Rynae E. Boler

Reg. 68491

Patent attorney

Chicago, IL · 60605

312-493-6040

Christopher Ladd Bollinger

Reg. 41626

Patent attorney

Schiff Hardin LLP

Chicago, IL · 60606

312-258-5724

Jay R. Bombien

Reg. 66569

Patent attorney

Banner Witcoff

Chicago, IL · 60606

312-463-5452

Rafael A Bombino

Reg. 73889

Patent attorney

Hoffman Estate, IL · 60192

815-347-2571

Amanda Streff Bonner

Reg. 65224

Patent attorney

Mayer Brown LLP

Chicago, IL · 60606

312-701-8645

Charles G Bonsell

Reg. 63928

Patent agent

Moline, IL · 61265

309-765-4825

Norris P Boothe

Reg. 74983

Patent attorney

Caterpillar Inc.

Peoria, IL · 61629

415-480-9211

Matthew T Boots

Reg. 80690

Patent agent

Klintworth & Rozenblat IP LLP

Chicago, IL · 60607

224-534-6555

Thomas S Borecki

Reg. 32964

Patent attorney

Wadsworth, IL · 60083

847-855-1375

Michael S. Borella

Reg. 62361

Patent attorney

McDonnell Boehnen Hulbert & Berghoff LLP

Chicago, IL · 60606

312-913-0001

Kevin E Borg

Reg. 51486

Patent agent

HINSDALE, IL · 60521

630-926-1218

Leah E. Borgsmiller

Reg. 84250

Patent agent

McDonnell Boehnen Hulbert & Berghoff

Chicago, IL · 60606

312-913-3381

Steven F Borsand

Reg. 36752

Patent attorney

Trading Technologies International, Inc.

Chicago, IL · 60606

312-476-1018

Mark A Borsos

Reg. 50479

Patent attorney

Fitch, Evan, Tabin & Flannery, LLP

Chicago, IL · 60603-3406

312-577-7000

Nicholas D. Bortz

Reg. 78003

Patent attorney

Rakoczy Molino Mazzochi Siwik LLP

Chicago, IL · 60654

312-527-2157

Michael F Borun

Reg. 25447

Patent attorney

Marshall, Gerstein & Borun, LLP

Chicago, IL · 60606

312-474-6300

Romi N Bose

Reg. 43322

Patent attorney

Fortive Corporation

Glenview, IL · 60026

630-340-1411

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.