Illinois

Patent attorneys in Illinois

Illinois hosts 2,889 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 Michael Best & Friedrich LLP, Arnold & Porter Kaye Scholer LLP, and King & Spalding LLP.

Top cities in Illinois

All practitioners in Illinois

Brent P Ray

Reg. 54390

Patent attorney

King & Spalding LLP

Chicago, IL · 60606

312-995-6333

Paul M. Raya

Reg. 60163

Patent attorney

Cook Alex Ltd.

Chicago, IL · 60606

312-236-8500

Matthew J Raymond

Reg. 45035

Patent agent

Kaenn Technologies

Berwyn, IL · 60402

David C Read

Reg. 39811

Patent attorney

Marshall Gerstein & Borun, LLP

Chicago, IL · 60606

312-474-6300

Joseph P Reagen

Reg. 35332

Patent attorney

Baxter Healthcare Corporation

Deerfield, IL · 60015

224-948-3315

Liam F Reardon

Reg. 63428

Patent attorney

Chicago, IL · 60608

312-420-4518

Timothy J. Rechtien

Reg. 70501

Patent attorney

Banner & Witcoff, LTD

Chicago, IL · 60606

312-463-5000

Christopher Joseph Reckamp

Reg. 34414

Patent attorney

Faegre Baker Daniels LLP

Chicago, IL · 60606

312-356-5094

Darien L Reddick

Reg. 57956

Patent attorney

Deere & Company

Moline, IL · 61265

309-748-2712

Prateek Reddy

Reg. 79156

Patent attorney

Michael Best & Friedrich LLP

Chicago, IL · 60606

312-596-5811

Joshua M Reed

Reg. 68564

Patent attorney

Allscripts

Chicago, IL · 60654

312-772-5674

Helen A Reetz

Reg. 39003

Patent attorney

Sysmex America, Inc.

Lincolnshire, IL · 60069

224-543-9406

Thomas A Reichert

Reg. 77326

Patent agent

Marion, IL · 62959

309-299-2431

Patrick C. Reidy

Reg. 72148

Patent attorney

Arnold & Porter Kaye Scholer LLP

Chicago, IL · 60602

312-583-2424

Nicole E. Reifman

Reg. 58792

Patent attorney

McDonnell Boehnen Hulbert & Berghoff LLP

Chicago, IL · 60606

312-913-0001

Theodore G. Reimann

Reg. 81972

Patent agent

Foley & Lardner LLP

Chicago, IL · 60654

312-832-4577

Susan Deborah Reinecke

Reg. 40198

Patent attorney

Michael Best & Friedrich LLP

Chicago, IL · 60611

312-222-0800

Pauls E Reinfelds

Reg. 64539

Patent attorney

Marathon Pharmaceuticals, LLC

Northbrook, IL · 60062

847-715-0607

Irene M Reininger

Reg. 48439

Patent attorney

Abbott Park, IL · 60064-6008

847-938-3797

Benjamin A. Rellinger

Reg. 73538

Patent agent

McDonnell, Boehnen, Hulbert & Berghoff LLP

Chicago, IL · 60606

312-913-3399

Matthew M Remissong

Reg. 69484

Patent attorney

Invention Mine LLC

Chicago, IL · 60661

312-585-7909

Edward Walter Remus

Reg. 25703

Patent attorney

Edward W. Remus

Geneva, IL · 60134

630-262-1366

Mark Herbert Remus

Reg. 40141

Patent attorney

Crowell & Moring

Chicago, IL · 60611

312-321-4720

Christopher J Renk

Reg. 33761

Patent attorney

Arnold & Porter Kaye Scholer LLP

Chicago, IL · 60602-4231

312-583-2300

Robert H Resis

Reg. 32168

Patent attorney

Banner and Witcoff, Ltd.

Chicago, IL · 60606

312-463-5000

Nicholas A Restauri

Reg. 71783

Patent attorney

Morgan Lewis & Bockius LLP

Chicago, IL · 60601

312-324-1000

Jonathan Eli Retsky

Reg. 34415

Patent attorney

Bryan Cave Leighton Paisner LLP

Chicago, IL · 60601

312-602-5000

Christopher A Reyes

Reg. 65131

Patent agent

Chicago, IL · 60655

773-679-8741

Steven J Reynolds

Reg. 61445

Patent attorney

DLA Piper US, LLP

Chicago, IL · 60601

312-368-4000

Roy B Rhee

Reg. 57303

Patent agent

Roy B. Rhee

Northbrook, IL · 60065

224-616-2828

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?

2,889 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.