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 Nixon Peabody LLP, Lowis & Gellen, LLP, and UOP, LLC.

Top cities in Illinois

All practitioners in Illinois

Natascia M Roman

Reg. 78216

Patent agent

Lowis & Gellen, LLP

Chicago, IL · 60604

847-714-6648

Ashley E Romano

Reg. 64554

Patent attorney

UOP, LLC

Des Plaines, IL · 60017

847-391-3976

Meghan R Rooney

Reg. 57261

Patent attorney

Chicago, IL · 60657

773-919-2875

Daniel S Roper

Reg. 75468

Patent agent

Lake Forest, IL · 60045

224-234-9427

Harry Joseph Roper

Reg. 22444

Patent attorney

Jenner & Block

Chicago, IL · 60654

312-923-8303

Nelson M. Rosario

Reg. 80333

Patent attorney

Rosario Tech Law, LLC

Chicago, IL · 60660

615-406-6112

Benjamin P. Rosborough

Reg. 83384

Patent attorney

Nixon Peabody LLP

Chicago, IL · 60602

312-425-3944

David Gustav Rosenbaum

Reg. 31872

Patent attorney

Rosenbaum IP, P.C.

Chicago, IL · 60606

847-770-6000

John Edward Rosenquist

Reg. 26356

Patent attorney

Green, Griffith & Borg-Breen LLP

Chicago, IL · 60611

312-883-8000

Michael D Ross

Reg. 45057

Patent attorney

Law Office of Michael Ross

Naperville, IL · 60563

630-631-4646

Robert John Ross

Reg. 45058

Patent attorney

Olson & Cepuritis, LTD.

Chicago, IL · 60606

312-580-1180

Thomas Irving Ross

Reg. 29275

Patent attorney

Marshall, Gerstein & Borun LLP

Chicago, IL · 60606

312-474-6300

Anna A Rostovtsev

Reg. 73482

Patent attorney

Edwardsville, IL · 62025

312-523-7985

Ariel H Roth

Reg. 78731

Patent attorney

Mars Wrigley

Chicago, IL · 60642

773-892-9497

Connor R.A. Roth

Reg. 902885

Limited recognition

Northwestern Pritzker School of Law

Chicago, IL · 60611

202-812-0202

Patrick E Rothstein

Reg. 78335

Patent agent

Marshall, Gerstein and Borun LLP

Chicago, IL · 60606

312-423-3462

Seymour Rothstein

Reg. 19369

Patent attorney

Olson & Cepuritis LTD

Chicago, IL · 60606

312-580-1180

Benjamin D Rotman

Reg. 69324

Patent attorney

Greensfelder, Hemker & Gale, P.C.

Chicago, IL · 60602

312-345-5016

Jeremy D. Roux

Reg. 72745

Patent attorney

Kirkland & Ellis LLP

Chicago, IL · 60654

312-862-3435

Kirk D Rowe

Reg. 67678

Patent attorney

Glen Ellyn, IL · 60137

Alice Cecilia Royer

Reg. 903016

Limited recognition

University of Illinois Chicago School of Law

Chicago, IL · 60604

786-991-6057

Roger F. Rozanski

Reg. 74450

Patent attorney

Chicago, IL · 60661-3691

312-906-5000

Kyle T. Rozema

Reg. 65699

Patent attorney

Chicago, IL · 60611

616-706-5125

Alexander Rozenblat

Reg. 54413

Patent attorney

Jenner & Block, LLP

Chicago, IL · 60654

312-222-9350

David Rozenblat

Reg. 47044

Patent attorney

KLINTWORTH & ROZENBLAT IP LLP

Chicago, IL · 60607

773-570-3330

Yongfeng Ruan

Reg. 80754

Patent agent

Crowell & Moring LLP

Chicago, IL · 60611

312-840-3259

Philipp Ruben

Reg. 78361

Patent attorney

McAndrews Held & Malloy, LTD

Chicago, IL · 60661

312-775-8000

Robin J. Rubrecht

Reg. 77253

Patent agent

Streamwood, IL · 60107

630-336-0208

Matthew S Rudd

Reg. 67152

Patent attorney

McAndrews, Held & Malloy, Ltd.

Chicago, IL · 60661

312-775-8000

Stephen Gary Rudisill

Reg. 20087

Patent attorney

Nixon Peabody LLP

Chicago, IL · 60602

312-425-8570

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.