Illinois

Patent attorneys in Illinois

Illinois hosts 2,889 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 Zebra Technologies Corporation, Patzik, Frank & Samotny Ltd., and Marshall Gerstein.

Top cities in Illinois

All practitioners in Illinois

Jason R Smalley

Reg. 67077

Patent attorney

WHEATON, IL · 60189

312-533-7347

Stephen A Smetana

Reg. 60940

Patent attorney

Chicago, IL · 60607

312-829-6417

Scott W Smilie

Reg. 44341

Patent attorney

Patzik, Frank & Samotny Ltd.

Chicago, IL · 60606

312-551-8300

Amelia E. Smith

Reg. 80122

Patent agent

Chicago, IL · 60659

312-771-8042

Andrew Reid Smith

Reg. 62162

Patent attorney

Marshall Gerstein

Chicago, IL · 60606

312-474-6300

Bradley W Smith

Reg. 34436

Patent attorney

US Department of Energy

Argonne, IL · 60439

630-252-2160

Clyde L Smith

Reg. 46292

Patent attorney

Martin Engineering Company

Neponset, IL · 61345

309-852-2384

Conor C Smith

Reg. 77273

Patent agent

Chicago, IL · 60618

617-990-7269

Cynthia L Smith

Reg. 53608

Patent attorney

Eugene Cummings, P.C.

Chicago, IL · 60606

312-948-4436

Donald C. Smith· III

Reg. 68524

Patent agent

Zebra Technologies Corporation

Llncolnshire, IL · 60069

847-793-5940

Douglas G Smith

Reg. 41317

Patent attorney

Kirkland & Ellis LLP

Chicago, IL · 60601

312-861-2072

Gregory J Smith

Reg. 37724

Patent attorney

Greg Smith Attorney at Law

Arlington Heights, IL · 60004

312-953-5607

Gregory M Smith

Reg. 43136

Patent attorney

Marshall, Gerstein & Borun LLP

Chicago, IL · 60606

312-474-6300

Howard A Smith

Reg. 61237

Patent agent

US Navy Office of General Counsel

Great Lakes, IL · 60088

847-688-3636X409

James Richard Smith

Reg. 41318

Patent attorney

Caterpillar Inc

Chicago, IL · 60661

619-544-2363

Jamie Sylvester Smith

Reg. 27390

Patent attorney

Naperville, IL · 60540

630-369-3272

John D Smith· III

Reg. 66743

Patent attorney

Lee Sullivan Shea & Smith LLP

Chicago, IL · 60661

312-754-9608

Joshua P. Smith

Reg. 74043

Patent attorney

Crowell & Moring LLP

Chicago, IL · 60611-5599

312-321-4200

Mark T Smith

Reg. 68284

Patent attorney

Perkins Coie LLP

Chicago, IL · 60603-5559

312-324-8474

Patrick J. Smith

Reg. 65626

Patent attorney

Greer, Burns & Crain

Chicago, IL · 60606

312-987-2927

Stephen C Smith

Reg. 56250

Patent attorney

Barnes & Thornburg

Chicago, IL · 60606

312-214-2112

Stephen C Smith

Reg. 53617

Patent attorney

Simmons, Browder, Gianaris, Angelides & Barnerd, LLC

Alton, IL · 62002

618-259-2222

Terri Hughes Smith

Reg. 41856

Patent attorney

Zebra Technologies Corporation

Schaumburg, IL · 60196

847-576-0741

Troy D Smith

Reg. 62349

Patent attorney

Freeborn & Peters

Chicago, IL · 60305

312-360-6926

Evan M Smola

Reg. 59475

Patent agent

Chicago, IL · 60611

770-841-5792

Vincent M Smolczynski

Reg. 68067

Patent attorney

Seyfarth Shaw LLP

Chicago, IL · 60607

312-460-5532

Zachary J Smolinski

Reg. 47100

Patent attorney

Smolinski Rosario Law P.C.

Chicago, IL · 60602

312-282-7263

Maxwell B Snow

Reg. 74357

Patent attorney

Leydig, Voit & Mayer, Ltd.

Chicago, IL · 60601

312-616-5700

James R Sobieraj

Reg. 30805

Patent attorney

Chicago, IL · 60610

312-321-4200

Brian J Sodikoff

Reg. 54697

Patent attorney

Katten Muchin Rosenman, LLP

Chicago, IL · 60661

312-902-5462

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?

2,889 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.