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 Marshall, Gerstein & Borun LLP, Northwestern Pritzker School of Law, and D. V. Allen & Associates.

Top cities in Illinois

All practitioners in Illinois

Ciara-Dawn Alison-Konteh

Reg. 902869

Limited recognition

Northwestern Pritzker School of Law

Chicago, IL · 60611

347-296-5409

Dillis V Allen

Reg. 22460

Patent attorney

D. V. Allen & Associates

Schaumburg, IL · 60173

847-413-1000

William J Allen

Reg. 51393

Patent attorney

Banner and Witcoff LTD

Chicago, IL · 60606

312-715-3489

Fraline J Allgaier

Reg. 63548

Patent attorney

Allgaier Patent Solutions

Glencoe, IL · 60022

847-242-0688

Michael J Allikian

Reg. 63549

Patent agent

Marshall, Gerstein & Borun LLP

Chicago, IL · 60606

312-474-6300

Matthew N Allison

Reg. 68746

Patent attorney

Marshall, Gerstein & Borun LLP

Chicago, IL · 60606

312-423-3438

Katherine L Allor

Reg. 72691

Patent attorney

K & L Gates LLP

Chicago, IL · 60602

312-807-4325

Tareq M Alosh

Reg. 80524

Patent attorney

Kirkland & Ellis LLP

Chicago, IL · 60654

312-956-8246

Sarah Kane Alpert

Reg. 901755

Limited recognition

DePaul University College of Law

Chicago, IL · 60604

Andrew M Alul

Reg. 51398

Patent attorney

Taft Stettinius & Hollister LLP

Chicago, IL · 60601

312-836-4135

Joy Ann Alwan

Reg. 40486

Patent attorney

US Department of Energy

Argonne, IL · 60439

630-252-2179

Imron T Aly

Reg. 48706

Patent attorney

Schiff Hardin LLP

Chicago, IL · 60606

312-258-5500

Joseph R. Ambrose

Reg. 78458

Patent attorney

Quarels & Brady LLP

Chicago, IL · 60606

312-715-5106

Keval H. Amin

Reg. 81342

Patent attorney

McDermott Will & Emery

Chicago, IL · 60606

630-940-9950

Themi Anagnos

Reg. 47388

Patent attorney

Continental Automotive Systems

Deer Park, IL · 60010

847-862-0021

Michael Benedict Anastasio

Reg. 47389

Patent attorney

Geneva, IL · 60134

312-315-3804

Ronald E Andermann

Reg. 57315

Patent attorney

Arlington Heights, IL · 60005

224-489-3840

Eric H. Anderson

Reg. 64048

Patent attorney

Chicago, IL · 60643

773-575-6815

Evan M Anderson

Reg. 39092

Patent attorney

Sikich

Chicago, IL · 60606

312-648-6680

Grant I Anderson

Reg. 68696

Patent agent

Naperville, IL · 60564

630-779-7404

Jeffrey D. Anderson

Reg. 51403

Patent agent

McDonnell Boehnen Hulbert & Berghoff LLP

Chicago, IL · 60606

312-913-0001

Mark R Anderson

Reg. 54656

Patent attorney

Actuate Law LLP

Chicago, IL · 60661

312-579-3136

Matthew V. Anderson

Reg. 64963

Patent attorney

Rakoczy Molino Mazzochi Siwik LLP

Chicago, IL · 60654

312-527-2157

Michael R. Anderson

Reg. 74659

Patent attorney

Marshall, Gerstein & Borun LLP

Chicago, IL · 60606

312-474-6300

Regina M Anderson

Reg. 35820

Patent attorney

Adlai E Stevenson High School

Lincolnshire, IL · 60069

847-415-4502

Richard H Anderson

Reg. 26526

Patent attorney

Marshall, Gerstein & Borun LLP

Chicago, IL · 60606

312-474-6300

Robert D Anderson

Reg. 33826

Patent attorney

Caledonia, IL · 61011

815-543-9663

Stephen K Anderson

Reg. 41584

Patent attorney

University Of Illinois

Urbana, IL · 61801

217-333-0560

Adam R Andrea

Reg. 67883

Patent attorney

Downers Grove, IL · 60516

847-431-0215

Brian C. Andress

Reg. 59927

Patent attorney

Deere & Company

Moline, IL · 61265

309-748-5048

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.