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, Corridor Law Group, P.C., and Nelson Bumgardner Conroy PC.

Top cities in Illinois

All practitioners in Illinois

Neil C Trueman

Reg. 65279

Patent attorney

Banner & Witcoff LTD

Chicago, IL · 60606

312-463-5000

Ryan M Truesdale

Reg. 72348

Patent attorney

Corridor Law Group, P.C.

Naperville, IL · 60563

630-417-7553

Long X Truong

Reg. 59164

Patent agent

Chicago, IL · 60660

Taryn N Trusty

Reg. 81987

Patent attorney

Nelson Bumgardner Conroy PC

Burr Ridge, IL · 60527

312-832-5120

Steven R Trybus

Reg. 32760

Patent attorney

Troutman Pepper Locke LLP

Chicago, IL · 60606

312-443-0699

Peter K Trzyna

Reg. 32601

Patent attorney

Chicago, IL · 60601

312-240-0824

Albert Y Tsui

Reg. 51066

Patent attorney

Cornell University

Ithaca, IL · 14850

607-254-5979

Christopher J Tuinenga

Reg. 80656

Patent attorney

Taft, Stettinius & Hollister

Chicago, IL · 60601

443-800-5531

Dmitry Tulchinsky

Reg. 62502

Patent agent

ASTELLAS US LLC

NORTHBROOK, IL · 60062-6111

818-223-1196

Paul S Tully

Reg. 44377

Patent attorney

Tully IP Group LLP

Chicago, IL · 60604

847-910-7092

Marko Tupanjac

Reg. 83886

Patent agent

Vedder Price P.C.

Chicago, IL · 60601

312-609-7588

Michael J Turgeon

Reg. 39404

Patent attorney

Vedder Price, P.C.

Chicago, IL · 60601

312-609-7500

Scott A Turk

Reg. 55826

Patent attorney

Vernon Hills, IL · 60061-2920

847-816-4538

Michael R Turner

Reg. 62015

Patent attorney

Neal, Gerber & Eisenberg LLP

Chicago, IL · 60602

312-827-1092

Malaika O Tyson

Reg. 68455

Patent attorney

McAndrews Held & Malloy LTD

Chicago, IL · 60661

312-775-8075

Alek Tziortzis

Reg. 66407

Patent agent

Dream25ky, LLC

Palatine, IL · 60067

224-409-8180

Bradley A Ullrick

Reg. 58951

Patent attorney

Argonne National Laboratory

Argonne, IL · 60439

630-252-3404

Katherine W Umpleby

Reg. 37470

Patent attorney

Peoria, IL · 61615

309-692-2565

David F. Underwood

Reg. 65230

Patent agent

Underwood and Associates, L.L.C.

Crystal Lake, IL · 60012

815-261-4363

Alan L Unikel

Reg. 24142

Patent attorney

Seyfarth Shaw LLP

Chicago, IL · 60603

312-460-5000

Shashank Upadhye

Reg. 48209

Patent attorney

Upadhye Tang LLP

Hinsdale, IL · 60522-0174

312-327-3326

Pranava Upadrashta

Reg. 81551

Patent attorney

Lemont, IL · 60439

630-252-4606

Adam E. Urbanczyk

Reg. 66500

Patent attorney

Au, LLC

Chicago, IL · 60661

312-715-7312

Jonathan H. Urbanek

Reg. 60686

Patent attorney

Fitch, Even, Tabin & Flannery, LLP

Chicago, IL · 60603-3406

312-577-7000

Jack L Uretsky

Reg. 30231

Patent attorney

Hinsdale, IL · 60521

630-323-5990

Smitha B Uthaman

Reg. 71355

Patent attorney

Latham & Watkins LLP

Chicago, IL · 60611

312-777-7124

Randall S Vaas

Reg. 34479

Patent attorney

Google Inc.

Chicago, IL · 60654

616-446-4103

Emanuel J Vacchiano

Reg. 43964

Patent attorney

Double Helix Law

Burr Ridge, IL · 60527

760-213-2360

Nina J. Vachhani

Reg. 71562

Patent attorney

Locke Lord LLP

Chicago, IL · 60606

312-443-1874

Fnu Vaidyanathan Vasanth

Reg. 800071

Limited recognition

Vaidyanathan Vasanth

Burr Ridge, IL · 60527

313-502-9340

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.