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, Norvell IP LLC, and Jazz Pharmaceuticals.

Top cities in Illinois

All practitioners in Illinois

Jay M. Burgett

Reg. 60651

Patent attorney

Norvell IP LLC

Northfield, IL · 60093

312-659-7157

Andrea Winslow Burke

Reg. 48586

Patent attorney

Jazz Pharmaceuticals

Lake Forest, IL · 60045

267-934-9574

John K Burke

Reg. 70606

Patent attorney

Vedder Price, P.C.

Chicago, IL · 60601

312-609-7500

Jennifer Burnette

Reg. 64594

Patent attorney

Marshall, Gerstein & Borun, LLP

Chicago, IL · 60606

312-474-6300

Andrew D. Burnham

Reg. 82330

Patent attorney

Husch Blackwell, LLP

Chicago, IL · 60606-3912

312-526-1605

Daniel J Burnham

Reg. 39618

Patent attorney

Nixon Peabody LLP

Chicago, IL · 60602

312-425-8513

Patrick G Burns

Reg. 29367

Patent attorney

Greer Burns & Crain LTD

Chicago, IL · 60606

312-987-4001

Sarah S Burns

Reg. 53635

Patent attorney

Simmons, Browder, Gianaris, Angelides & Barnerd LLC

Alton, IL · 62002

618-259-2222

Thomas R Burns

Reg. 77681

Patent attorney

Chicago, IL · 60613

773-687-8577

Scott A Burow

Reg. 42373

Patent attorney

Banner & Witcoff, Ltd

Chicago, IL · 60606

312-463-5000

Matthew I. Burton

Reg. 75644

Patent attorney

John Deere

Moline, IL · 61265

309-765-8000

Thomas J Burton

Reg. 47464

Patent attorney

Siemens Corporation

Buffalo Grove, IL · 60089

847-941-6823

Charles O. Busch

Reg. 84443

Patent agent

McDonnell Boehnen Hulbert & Berghoff LLP

Chicago, IL · 60606

312-913-2113

Matthew J Bussan

Reg. 33614

Patent attorney

Pecatonica, IL · 61063-9364

847-462-1937

Brittany N. Butler

Reg. 75706

Patent agent

Chicago, IL · 60625

224-622-7129

Christopher D Butts

Reg. 67558

Patent agent

McDonnell Boehnen Hulbert & Berghoff LLP

Chicago, IL · 60606

312-913-2124

Christopher M. Cabral

Reg. 70908

Patent attorney

Much Shelist PC

Chicago, IL · 60606

312-521-2763

Phil B Cage

Reg. 81556

Patent agent

Chicago, IL · 60623

303-847-5923

Jacob M Cahnman

Reg. 74842

Patent agent

Wilmette, IL · 60091

847-560-1560

Anthony J. Calamia· Jr

Reg. 81256

Patent attorney

Lempia Summerfield Katz LLC

Chicago, IL · 60603

312-854-8380

Stacy E Caldwell

Reg. 36917

Patent agent

Winfield, IL · 60190

630-247-9161

John W. Calkins

Reg. 43523

Patent attorney

Northwestern University

Evanston, IL · 60208

847-491-5605

Sarah A Calvin

Reg. 41654

Patent attorney

Childress Duffy Goldblatt, LTD

Chicago, IL · 60610

312-494-0200

Nicholas Anthony Camasto

Reg. 19202

Patent attorney

River Forest, IL · 60305

708-366-0406

Benjamin A Campbell

Reg. 61030

Patent attorney

BISHOP DIEHL & LEE. LTD.

Schaumburg, IL · 60173

847-969-9173

Casey G Campbell

Reg. 77381

Patent attorney

Barnes & Thornburg, LLP

Chicago, IL · 60606

312-214-4828

Michael F Campbell

Reg. 31747

Patent agent

Champaign, IL · 61822

217-352-7641

Thomas J Campbell· Jr

Reg. 70094

Patent attorney

Neal, Gerber & Eisenberg LLP

Chicago, IL · 60602

312-269-5357

Matthew J. Canna

Reg. 60066

Patent attorney

Hinshaw & Culbertson, LLP

Chicago, IL · 60601

312-704-3000

Leon M. Cao

Reg. 83952

Patent attorney

Banner & Witcoff

Chicago, IL · 60606

312-463-5461

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.