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 Ladas & Parry LLP, Greenberg Traurig, LLP, and Cooley LLP.

Top cities in Illinois

All practitioners in Illinois

Slavica Galic

Reg. 68328

Patent attorney

Chicago, IL · 60657

773-406-3870

Mark R Galis

Reg. 36805

Patent attorney

Greenberg Traurig, LLP

Chicago, IL · 60601

312-456-6589

Audrey Theresa Gallagher

Reg. 77360

Patent agent

Cooley LLP

Chicago, IL · 60606

312-881-6717

Douglas G Gallagher

Reg. 57783

Patent attorney

Ladas & Parry LLP

Chicago, IL · 60604

312-408-1300

Patrick C Gallagher

Reg. 63407

Patent attorney

Duane Morris LLP

Chicago, IL · 60603

312-499-6759

Priscilla F Gallagher

Reg. 32223

Patent attorney

McAndrews Held and Malloy. Ltd.

Chicago, IL · 60661

312-775-8000

Norval B Galloway· III

Reg. 33595

Patent attorney

Lemont, IL · 60439

630-243-1028

Kristin C Galvin

Reg. 80947

Patent attorney

Chicago, IL · 60606

708-704-1988

Ajay K Gambhir

Reg. 44115

Patent attorney

IP Spring, LLC

Chicago, IL · 60602

347-449-1577

Marta Gomez Gamboa

Reg. 78781

Patent agent

Lempia Summerfield Katz, LLC

Chicago, IL · 60603

312-854-8338

Nancy R Gamburd

Reg. 38147

Patent attorney

Gamburd Law Group LLC

Chicago, IL · 60602

312-399-9332

Edward P Gamson

Reg. 29381

Patent attorney

Husch Blackwell LLP

Chicago, IL · 60606

312-655-1500

Michael D Gannon

Reg. 36807

Patent attorney

Baker & Hostetler LLP

Chicago, IL · 60606

312-416-6294

Frank Gao

Reg. 62565

Patent attorney

Ladas & Parry LLP

Chicago, IL · 60604

312-427-1300

Anastasios G Garbis

Reg. 67915

Patent attorney

Hinsdale, IL · 60521

312-952-3085

Dawn M. Gardner

Reg. 44118

Patent attorney

Rakoczy Molino Mazzochi Siwik

Chicago, IL · 60654

312-222-7505

Janet M Garetto

Reg. 42568

Patent attorney

Nixon Peabody LLP

Chicago, IL · 60602

312-425-8514

Jeffrey R Gargano

Reg. 38148

Patent attorney

McDermott Will & Emery LLP

Chicago, IL · 60606-5096

312-984-7733

Colleen M Garlington

Reg. 72801

Patent attorney

Kirkland & Ellis, LLP

Chicago, IL · 60654

312-862-7019

Scott A Garnick

Reg. 68852

Patent attorney

HERE North America LLC

Chicago, IL · 60606

847-894-5935

John R Garrett

Reg. 27888

Patent attorney

Carmen Patti Law Group, LLC

Chicago, IL · 60602

847-508-2371

Russell A Garrison

Reg. 71461

Patent attorney

Stedan Company

Northfield, IL · 60093

847-501-2290

Arthur A Gasey

Reg. 35150

Patent attorney

Niro, Haller and Niro

Chicago, IL · 60602

312-377-3245

Geraldine A Gashkoff

Reg. 38151

Patent attorney

DSM Desotech Inc.

Elgin, IL · 60120

847-608-2558

Peter A Gashkoff

Reg. 38152

Patent attorney

University of Illinois

Chicago, IL · 60612

312-996-7333

Christopher J. Gass

Reg. 69265

Patent attorney

Leydig, Voit & Mayer, Ltd

Chicago, IL · 60601

312-616-5634

David A Gass

Reg. 38153

Patent attorney

Marshall, Gerstein & Borun LLP

Chicago, IL · 60606

312-474-6300

Amy J Gast

Reg. 41773

Patent attorney

K&L Gates LLP

Chicago, IL · 60602-4207

312-807-4230

Catherine D Gates

Reg. 51132

Patent agent

Entegris

Aurora, IL · 60504

630-375-5504

Patrick G Gattari

Reg. 39682

Patent attorney

McDonnell Boehnen Hulbert & Berghoff LLP

Chicago, IL · 60606

312-913-0001

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.