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 Banner & Witcoff, LTD, Steptoe & Johnson LLP, and Quarles & Brady LLP.

Top cities in Illinois

All practitioners in Illinois

Gregory G Schlenz

Reg. 55597

Patent attorney

Banner & Witcoff, LTD

Chicago, IL · 60606

312-463-5000

Stanley Allen Schlitter

Reg. 28799

Patent attorney

Steptoe & Johnson LLP

Chicago, IL · 60603

312-577-1250

Nicholas P Schmidbauer

Reg. 56610

Patent attorney

Quarles & Brady LLP

Chicago, IL · 60654-3422

312-715-5072

David W Schmidt

Reg. 63779

Patent attorney

Chicago, IL · 60640

224-500-7454

John L Schmitt

Reg. 28111

Patent attorney

Geneva, IL · 60134

630-232-7420

Marshall J Schmitt

Reg. 52195

Patent attorney

Michael Best & Friedrich LLP

Chicago, IL · 60606

312-222-0800

Sanford J Schmolka

Reg. 55598

Patent agent

Deerfield, IL · 60015

847-215-2652

Jerold Bruce Schnayer

Reg. 28903

Patent attorney

Law Offices of Jerold Schnayer, LLC

Glencoe, IL · 60022

312-898-1104

Jonathan A. Schnayer

Reg. 75921

Patent agent

Dickinson Wright PLLC

Chicago, IL · 60603

312-423-8197

Caroline A. Schneider

Reg. 75800

Patent attorney

Fitch, Even, Tabin & Flannery LLP

Chicago, IL · 60603

312-577-7000

Christopher B Schneider

Reg. 40803

Patent attorney

Schiff Hardin and Waite

Chicago, IL · 60606

312-258-5583

Lisa A Schneider

Reg. 43907

Patent attorney

Chicago, IL · 60647

773-672-3740

Robert Jerome Schneider

Reg. 27383

Patent attorney

IPHorgan

Buffalo Grove, IL · 60089-1768

847-808-5500

Michelle N. Schneiderheinze

Reg. 44891

Patent attorney

Williams & Swee Ltd.

Bloomington, IL · 61701

309-827-4371

Mary Jankousky Schnurr

Reg. 31377

Patent attorney

Rexam Beverage Can Company

Chicago, IL · 60031

773-399-3604

Richard Allen Schnurr

Reg. 30890

Patent attorney

RAS Properties, Ltd.

Chicago, IL · 60093

312-925-2228

Gregory G Schodde

Reg. 36668

Patent attorney

McAndrews Held and Malloy LTD

Chicago, IL · 60661

312-775-8000

David Jay Schodin

Reg. 41294

Patent agent

DJSchodin Law

Lindenhurst, IL · 60046

847-946-0338

Andrea E. Schoen

Reg. 63969

Patent agent

LanzaTech New Zealand Limited

Skokie, IL · 60077

847-324-2446

Ekkehard Schoettle

Reg. 31420

Patent attorney

BP America Inc.

Naperville, IL · 60563

630-420-4367

Maurice J. Scholten

Reg. 63917

Patent attorney

Chicago, IL · 60657

773-332-7741

Joseph F. Schreiner

Reg. 74387

Patent agent

Joseph Schreiner, Patent Agent

Chicago, IL · 60634

773-685-7879

Elizabeth A Schrieber

Reg. 83416

Patent agent

Chicago, IL · 60614

610-290-2013

James C. Schroeder

Reg. 75638

Patent attorney

Schroeder Intellectual Property Law Group, LLC

Deerfield, IL · 60015

847-964-9475

Jason J Schroeder

Reg. 65589

Patent agent

Crystal Lake, IL · 60014

815-459-5299

Michael J Schubert

Reg. 72107

Patent attorney

Leydig, Voit & Mayer, Ltd.

Chicago, IL · 60601-6731

312-616-5600

Scott H Schulhof

Reg. 53568

Patent attorney

Groupon, Inc.

Chicago, IL · 60654

312-254-4924

Alison Pollock Schwartz

Reg. 43863

Patent attorney

Loeb & Loeb LLP

Chicago, IL · 60654

312-464-3169

Daniel J Schwartz

Reg. 55603

Patent attorney

Faegre Baker Daniels LLP

Chicago, IL · 60606

312-212-2335

David L Schwartz

Reg. 42133

Patent attorney

Northwestern University School of Law

Chicago, IL · 60611-3069

312-503-2646

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.