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, Banner & Witcoff, Ltd, and Partridge Partners PC.

Top cities in Illinois

All practitioners in Illinois

Todd S Parkhurst

Reg. 26494

Patent attorney

Partridge Partners PC

Chicago, IL · 60654

312-634-9517

Michael A Parks

Reg. 40762

Patent attorney

Thompson Coburn LLP

Chicago, IL · 60603

312-580-2237

Raymond E Parks

Reg. 26972

Patent agent

Chicago, IL · 60632

773-582-0944

Steven M. Parks

Reg. 61889

Patent attorney

Marshall, Gerstein & Borun LLP

Chicago, IL · 60606

312-474-6300

Steven G Parmelee

Reg. 28790

Patent attorney

Fitch, Even, Tabin & Flannery, LLP

Chicago, IL · 60603-3406

312-577-7000

Keith D Parr

Reg. 33322

Patent attorney

Buchanan Ingersoll & Rooney PC

Chicago, IL · 60606

312-261-8733

Michael C. Parris

Reg. 74868

Patent agent

Dentons US LLP

Chicago, IL · 60606

William E Parry

Reg. 27934

Patent attorney

Hinsdale, IL · 60521

630-921-1288

James C Paschall

Reg. 36887

Patent attorney

Paschall & Associates, LLC

Arlington Heights, IL · 60004

872-810-2992

Jonathan R Pasky

Reg. 59871

Patent attorney

Pasky IP Law LLC

Chicago, IL · 60654

312-772-3510

Ronald J Pasowicz

Reg. 53438

Patent attorney

Chicago, IL · 60616-2220

312-674-0291

Thomas G Pasternak

Reg. 36990

Patent attorney

Akerman LLP

Chicago, IL · 60606

312-870-8019

Matthew P Pasulka

Reg. 42981

Patent agent

Peru, IL · 61354

763-531-3038

Prerna P Pasulka

Reg. 77229

Patent attorney

Susan Lampert & Associates

Deerfield, IL · 60015

773-719-5213

Sean M. Patchin· Jr.

Reg. 77772

Patent attorney

Greenberg Traurig

Chicago, IL · 60607

310-597-8287

Aseet Patel

Reg. 53874

Patent attorney

Banner & Witcoff, Ltd

Chicago, IL · 60606-7407

312-463-5000

Binal J Patel

Reg. 42065

Patent attorney

Banner & Witcoff, Ltd

Chicago, IL · 60606

312-465-5000

Chintan P. Patel

Reg. 63538

Patent attorney

Palos Hills, IL · 60465

708-955-0738

Jasmine R Patel

Reg. 59344

Patent attorney

Naperville, IL · 60565

312-823-6662

Kevin S Patel

Reg. 67721

Patent attorney

Chicago, IL · 60603

312-954-2157

Neel K Patel

Reg. 59452

Patent agent

Hewlett Packard Enterprise

Chicago, IL · 60601

331-214-6363

Nirav Patel

Reg. 46981

Patent attorney

ArcelorMittal USA LLC

Chicago, IL · 60603

312-899-3027

Ria Nilax Patel

Reg. 902821

Limited recognition

DePaul University College of Law

Chicago, IL · 60604

Ronak A. Patel

Reg. 73272

Patent attorney

Chicago, IL · 60661

224-628-0208

Rupal N. Patel

Reg. 58768

Patent attorney

Chicago, IL · 60611

312-286-5644

Sachin M. Patel

Reg. 79702

Patent attorney

Jones Day

Chicago, IL · 60601

312-269-4295

Sailesh K Patel

Reg. 46982

Patent attorney

Schiff Hardin LLP

Chicago, IL · 60606

312-258-5698

Sandip H Patel

Reg. 43848

Patent attorney

Marshall, Gerstein & Borun LLP

Chicago, IL · 60606

312-474-6300

Tanvi B Patel

Reg. 70108

Patent attorney

Neal, Gerber & Eisenberg, LLP

Chicago, IL · 60602

312-269-8000

Viren V Patel

Reg. 54366

Patent agent

Bloomingdale, IL · 60108

630-582-1926

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.