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 Cook County State's Attorney's Office, McDonnell Boehnen Hulbert & Berghoff LLP, and US Environmental Protection Agcy.

Top cities in Illinois

All practitioners in Illinois

Julie R Gunnigle

Reg. 64023

Patent attorney

Cook County State's Attorney's Office

Chicago, IL · 60608

773-681-2697

Sophia Gunzburg

Reg. 82297

Patent agent

Chicago, IL · 60657

203-536-8002

Gaurav Gupta

Reg. 73494

Patent attorney

McDonnell Boehnen Hulbert & Berghoff LLP

Chicago, IL · 60606

312-913-2124

Kaushal Gupta

Reg. 51761

Patent attorney

US Environmental Protection Agcy

Chicago, IL · 60604

312-886-6803

Richard J Gurak

Reg. 41050

Patent attorney

Advitam IP, LLC

Chicago, IL · 60606

312-332-7700

Szymon M Gurda

Reg. 58451

Patent attorney

Cherskov & Flaynik

Chicago, IL · 60602

312-621-1330

Daniel M Gurfinkel

Reg. 34177

Patent attorney

Dennemeyer & Associates, LLC

Chicago, IL · 60606

312-380-6500

Vladimir Gutkovsky

Reg. 64604

Patent attorney

Skokie, IL · 60076

847-387-2134

Kathryn M. Gutman

Reg. 901404

Limited recognition

University of Illinois Chicago School of Law

Chicago, IL · 60604

260-466-9020

Kevin W Guynn

Reg. 29927

Patent attorney

Greer, Burns & Crain, LTD

Chicago, IL · 60606-6771

312-360-0080

Mary E Guzman

Reg. 73958

Patent attorney

Niles, IL · 60714

847-682-7443

Rachel A Guzowski

Reg. 61705

Patent attorney

K&L Gates LLP

Chicago, IL · 60602-4207

312-807-4441

Eric D. Ha

Reg. 84513

Patent agent

Charleston, IL · 61920

240-716-4451

Jameelah I. Haadee

Reg. 73244

Patent attorney

Deere and Company

Moline, IL · 61265

309-748-4035

Brian E Haan

Reg. 62567

Patent attorney

Lee Sheikh & Haan LLC

Chicago, IL · 60603

312-982-0070

Allison Marie Haas

Reg. 77919

Patent attorney

Reed Smith LLC

Chicago, IL · 60606

312-207-2405

Kenneth A Haas

Reg. 42614

Patent agent

Motorola, Inc.

Schaumburg, IL · 60196

847-576-6937

Rolland R Hackbart

Reg. 28217

Patent agent

Buffalo Grove, IL · 60089

847-421-2227

Dennis P Hackett

Reg. 52482

Patent attorney

Banner & Witcoff, Ltd.

Chicago, IL · 60606

312-463-5000

Andrea M Haferkamp

Reg. 52981

Patent attorney

Arlington Heights, IL · 60004

847-525-0236

Mark A Hagedorn

Reg. 44731

Patent attorney

Barnes & Thornburg LLP

Chicago, IL · 60606

312-357-1313

Juliana M Hagen

Reg. 66613

Patent agent

Peoria, IL · 61614

309-693-9302

Sarine Rebecca Hagopian

Reg. 77178

Patent attorney

Chicago, IL · 60661

847-940-8509

Claire L. Hagrelius

Reg. 64564

Patent agent

Sycamore, IL · 60178

217-621-2459

Saira B Haider

Reg. 70167

Patent attorney

Chicago, IL · 60604

646-406-4889

Patrick W Hajduch

Reg. 62907

Patent attorney

Chicago, IL · 60622

630-606-2217

Christopher S. Hall

Reg. 59341

Patent attorney

Christopher Hall & Associates, L.L.C.

Chicago, IL · 60614

312-545-4355

Jason D. Hall

Reg. 70196

Patent attorney

SunVest Solar, LLC

Chicago, IL · 60661

262-547-1200

Jennifer M Hall

Reg. 38169

Patent attorney

Mars, Inc.

Chicago, IL · 60642

312-794-6539

Timothy J. Haller

Reg. 26692

Patent attorney

HALLER LAW PLLC

Chicago, IL · 60611

630-336-4283

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.