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, Coriant Operation, Inc., and Mayer Brown LLP.

Top cities in Illinois

All practitioners in Illinois

Kenneth J Rudofski

Reg. 35997

Patent attorney

Coriant Operation, Inc.

Naperville, IL · 60563

630-798-3021

Randall George Rueth

Reg. 45887

Patent attorney

Marshall, Gerstein & Borun LLP

Chicago, IL · 60606

312-474-6300

Deborah Schavey Ruff

Reg. 33770

Patent attorney

Mayer Brown LLP

Chicago, IL · 60606

312-701-8601

Samuel J. Ruggio

Reg. 74543

Patent attorney

Benesch Friedlander Coplan & Aronoff LLP

Chicago, IL · 60005

312-624-6379

Douglas S Rupert

Reg. 44434

Patent attorney

Baker & Hostetler, LLP

Chicago, IL · 60606

312-416-6244

Jennifer A Rupert

Reg. 47047

Patent attorney

Chicago, IL · 60646

773-286-3674

Brian C Rupp

Reg. 35665

Patent attorney

Leydig, Voit & Mayer, Ltd.

Chicago, IL · 60601-6731

312-616-5631

Jeffrey A Ruppel

Reg. 57068

Patent attorney

Caterpillar Incorporated

Peoria, IL · 61629-6490

309-675-5525

Pamela Jean Ruschau

Reg. 34242

Patent attorney

Leydig Voit & Mayer LTD

Chicago, IL · 60601

312-616-5600

Bryan C Rutsch

Reg. 57370

Patent attorney

Kirkland & Ellis, LLP

Chicago, IL · 60654

312-862-2000

Daymon L Ruttenberg

Reg. 58639

Patent attorney

Brinks Hofer Gilson & Lione

Chicago, IL · 60611-5599

312-245-5347

Elizabeth D Ruzich

Reg. 54416

Patent attorney

IP Spring

Chicago, IL · 60601

678-595-3977

Richard Thomas Ruzich

Reg. 45062

Patent attorney

Taft Stettinius & Hollister LLP

Chicago, IL · 60601

312-836-4012

Christopher D Ryan

Reg. 68472

Patent attorney

TAVAS, LLC

Arlington Heights, IL · 60004

800-595-4176

Margot Maureen Ryan

Reg. 77094

Patent attorney

McDonnell Boehnen Hulbert & Berghoff

Chicago, IL · 60606

312-913-3381

Robert B Ryan

Reg. 53539

Patent attorney

Orland Park, IL · 60462

708-403-0519

Julia G Rybakova

Reg. 68621

Patent agent

Chicago, IL · 60690

847-612-2091

Renee J Rymarz

Reg. 35666

Patent attorney

Kraft Foods

Northfield, IL · 60093

847-646-5327

James Daniel Ryndak

Reg. 28754

Patent attorney

Hinshaw & Culbertson LLP

Chicago, IL · 60601-1081

312-704-3520

Pawel A. Rzucidlo

Reg. 80390

Patent agent

Elgin, IL · 60124

773-899-5002

Kristopher T. Sabatini

Reg. 81413

Patent agent

Hanley, Flight, and Zimmerman, LLC

Chicago, IL · 60606

312-676-1727

Randy V Sabett

Reg. 43074

Patent attorney

SNR Denton US LLP

Chicago, IL · 60606-1080

312-876-7925

Adam Kevin Sacharoff

Reg. 43075

Patent attorney

MUCH SHELIST

Chicago, IL · 60606

312-521-2775

Lilia I Safonov

Reg. 45967

Patent agent

Wheeling, IL · 60090

847-338-6232

Bobby Sahachartsiri

Reg. 78046

Patent attorney

Marshall, Gerstein & Borun LLP

Chicago, IL · 60606-6357

312-474-6300

Pradip Kumar Sahu

Reg. 45551

Patent attorney

USG Corporation, Corporate Innovation Center

Libertyville, IL · 60048

847-970-5093

Marina N Saito

Reg. 42121

Patent attorney

Law Office of Edward H Rice, LLC

Northbrook, IL · 60062

312-420-5454

Indira Saladi

Reg. 45759

Patent attorney

Glencoe, IL · 60022

630-524-0010

Gabriella M Salek

Reg. 80924

Patent attorney

ArentFox Schiff LLP

Chicago, IL · 60606

312-258-5518

Piya G Salgia

Reg. 75158

Patent attorney

Deere & Company

Moline, IL · 61265

309-748-1993

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.