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 McAndrew, Held & Malloy, Ltd., Jeffrey W. Salmon Law LLC, and Hanley, Flight & Zimmerman, LLC.

Top cities in Illinois

All practitioners in Illinois

Frank G Salinas

Reg. 62346

Patent agent

McAndrew, Held & Malloy, Ltd.

Chicago, IL · 60661

312-775-8174

Jeffrey W Salmon

Reg. 37435

Patent attorney

Jeffrey W. Salmon Law LLC

Glenview, IL · 60025

773-294-5381

Scott D Salmon

Reg. 68130

Patent attorney

Hanley, Flight & Zimmerman, LLC

Chicago, IL · 60606

312-580-1020

Allison May Salo

Reg. 902650

Limited recognition

University of Illinois Chicago School of Law

Chicago, IL · 60604

734-625-1873

Joseph Albert Saltiel

Reg. 47915

Patent attorney

Irwin IP LLC

Chicago, IL · 60606

312-667-6080

Jay Adam Saltzman

Reg. 38293

Patent attorney

Glenview, IL · 60025

224-661-7779

Lawrence H Salud

Reg. 57131

Patent agent

Chicago, IL · 60606

312-485-9976

Alan Barry Samlan

Reg. 28470

Patent attorney

Knechtel Demeur & Samlan

Chicago, IL · 60661

312-655-9900

William J. Samore

Reg. 66337

Patent attorney

Marshall, Gerstein & Borun LLP

Chicago, IL · 60606-6357

312-474-6641

Emily A. Sample

Reg. 79282

Patent attorney

MG+M The Law Firm

Chicago, IL · 60603

406-219-6324

Matthew J Sampson

Reg. 35999

Patent attorney

Lee Sullivan Shea & Smith, LLP

Chicago, IL · 60661

312-757-4637

Stephanie F. Samz

Reg. 69845

Patent attorney

McAndrews, Held & Malloy, Ltd.

Chicago, IL · 60661

312-775-8000

Alexandra J. Sanborn

Reg. 70408

Patent agent

Lincoln, IL · 62656

217-502-6017

Callie J. Sand

Reg. 73254

Patent attorney

Greenberg Traurig, LLP

Chicago, IL · 60601

312-456-8400

Ronald Allen Sandler

Reg. 23066

Patent attorney

Chicago, IL · 60610

312-543-4352

Gregory B. Sanford

Reg. 76719

Patent attorney

Kirkland & Ellis, LLP

Chicago, IL · 60654

312-862-2744

Michael C. Sanko

Reg. 82541

Patent attorney

Venable LLP

Chicago, IL · 60606

312-210-1527

James W. Sanner

Reg. 77255

Patent attorney

Leydig Voit & Mayer, LTD.

Chicago, IL · 60601

312-616-5600

Natasha D Sansone

Reg. 75160

Patent agent

Tempus Labs, Inc.

Chicago, IL · 60654

833-514-4187

Hariharan Santhanam

Reg. 68828

Patent attorney

Kirkland & Ellis LLP

Chicago, IL · 60654

312-862-7172

Michael Peter Santonocito

Reg. 71189

Patent attorney

Quarles & Brady LLP

Chicago, IL · 60606

312-715-2714

Stephen T Saporta

Reg. 47054

Patent attorney

Saporta Law Offices

Joliet, IL · 60435

312-984-0418

Dusan Sarapa

Reg. 62012

Patent attorney

Foley & Lardner LLP

Chicago, IL · 60610

312-832-5156

Larry L Saret

Reg. 27674

Patent attorney

Michael Best & Friedrich LLP

Chicago, IL · 60606

312-661-2116

Anthony Joseph Sarli· Jr

Reg. 24517

Patent attorney

St. Charles, IL · 60175

630-443-8394

Joshua D Sarnoff

Reg. 36913

Patent attorney

DePaul University College of Law

Chicago, IL · 60604

312-362-6326

Steven John Sarussi

Reg. 32784

Patent attorney

McDonnell Boehnen Hulbert & Berghoff LLP

Chicago, IL · 60606

312-913-0001

Claire E. Saskowski

Reg. 77538

Patent attorney

Beem Patent Law Firm

Chicago, IL · 60604

312-201-0011

Matthew D Satchwell

Reg. 58870

Patent attorney

DLA Piper LLP (US)

Chicago, IL · 60601

312-368-2111

Joseph Ronald Sauer

Reg. 62775

Patent attorney

Carle Foundation Hospital

Urbana, IL · 61801

630-881-4073

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.