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 Crowell & Moring LLP, McAndrews, Held & Malloy, Ltd., and Imm Atty, LLC.

Top cities in Illinois

All practitioners in Illinois

Helya M Azari

Reg. 63586

Patent agent

Schaumburg, IL · 60194

847-660-0327

Y Judd Azulay

Reg. 27768

Patent attorney

Imm Atty, LLC

Chicago, IL · 60601

312-661-9100

Maheen R Baber

Reg. 67987

Patent attorney

Chicago, IL · 60614

312-371-4694

Donell D Babino· Sr.

Reg. 74900

Patent attorney

Plainfield, IL · 60585

815-782-1971

Mark C Bach

Reg. 34766

Patent attorney

NAVISTAR, INC.

Lisle, IL · 60532

331-332-3039

Jacob C Bachman

Reg. 61906

Patent attorney

Crowell & Moring LLP

Chicago, IL · 60611

312-321-4200

Sangik Bae

Reg. 78559

Patent attorney

JPMorgan Chase Bank, N.A.

Chicago, IL · 60603-2300

312-732-1164

Peter R Bahn

Reg. 31462

Patent attorney

MT Vernon, IL · 62864

618-244-4868

Kevin D Bailey

Reg. 46531

Patent attorney

Deere & Company

Moline, IL · 61265

309-765-4392

Stacy A Baim

Reg. 44534

Patent attorney

Actuate Law LLC

Chicago, IL · 60661

312-579-3126

Michael J. Baima

Reg. 62023

Patent attorney

Ernst & Young LLP

Chicago, IL · 60606

312-879-2300

Elizabeth W. Baio

Reg. 62744

Patent attorney

Nixon Peabody LLP

Chicago, IL · 60602

312-425-8684

Geoffrey A Baker

Reg. 51427

Patent agent

Smart Options, LLC

Chicago, IL · 60654

708-707-8778

Maurie G Baker

Reg. 56090

Patent agent

McAndrews, Held & Malloy, Ltd.

Chicago, IL · 60661

312-775-8000

Simeon M Balban

Reg. 52586

Patent agent

Skokie, IL · 60076

847-674-1594

Alison J Baldwin

Reg. 48968

Patent attorney

Faegre Drinker Biddle & Reath LLP

Chicago, IL · 60606

312-569-1456

James R Baldwin

Reg. 69060

Patent attorney

Neal, Gerber & Eisenberg LLP

Chicago, IL · 60602

312-269-5281

Kourtney N Baltzer

Reg. 65294

Patent attorney

Chicago, IL · 60614

219-309-5123

Michael H Baniak

Reg. 30608

Patent attorney

Seyfarth Shaw LLP

Chicago, IL · 60603

312-460-5837

Lisa M. Bannapradist

Reg. 58644

Patent agent

Chicago, IL · 60606

630-605-0770

Uma D Bansal

Reg. 67208

Patent attorney

Chicago, IL · 60603

Yixin Bao

Reg. 800121

Limited recognition

Crowell & Moring LLP

Chicago, IL · 60611

312-321-7730

Donald L Barbeau

Reg. 29766

Patent agent

Evanston, IL · 60203

847-679-1146

Joseph W. Barber

Reg. 71724

Patent attorney

Howard & Howard Attorneys

Chicago, IL · 60604

312-372-4000

Joseph M Barich

Reg. 42291

Patent attorney

Barich IP Law Group

Chicago, IL · 60606

312-620-2471

Aaron A Barlow

Reg. 34119

Patent attorney

Jenner & Block LLP

Chicago, IL · 60654

312-923-8308

Carol Lynn Barnes

Reg. 48646

Patent attorney

Carol Lynn Barnes, Attorney at Law

Chicago, IL · 60615

847-682-0688

Deric James Barnes

Reg. 48869

Patent attorney

DH EAS Employment LLC, a Veralto company

Wood Dale, IL · 60191

630-334-4076

Dunstan H Barnes

Reg. 78560

Patent attorney

McAndrews, Held & Malloy, Ltd.

Chicago, IL · 60661

312-775-8000

Heather M Barnes

Reg. 44022

Patent attorney

IDEX Corporation

Northbrook, IL · 60062

847-498-7070

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.