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 Quinn Emanuel Urquhart & Sullivan, LLP, Zebra Technologies, and Lee Sullivan Shea & Smith LLP.

Top cities in Illinois

All practitioners in Illinois

Marc L Kaplan

Reg. 69748

Patent attorney

Quinn Emanuel Urquhart & Sullivan, LLP

Chicago, IL · 60606

312-705-7400

Dimitry Kapmar

Reg. 62998

Patent attorney

Zebra Technologies

Lincolshire, IL · 60069

847-634-6700

Dennis G. Kapolnek

Reg. 68541

Patent attorney

Lee Sullivan Shea & Smith LLP

Chicago, IL · 60661

563-343-3058

Robert F. Kappers

Reg. 70202

Patent attorney

Steptoe LLP

Chicago, IL · 60606

312-577-1300

Kyler J. Kappes

Reg. 83827

Patent agent

Chicago, IL · 60642

920-257-3024

Alexander R. Karana

Reg. 80220

Patent attorney

von Briesen & Roper, s.c.

Chicago, IL · 60606

312-676-7597

Nedra D Karim

Reg. 39246

Patent agent

Long Grove, IL · 60047

630-903-8870

Salvador Kurt Karottki

Reg. 53098

Patent attorney

Tribune Media Company

Chicago, IL · 60611

312-222-3290

Andrew B Karp

Reg. 61586

Patent attorney

McAndrews, Held & Malloy, Ltd.

Chicago, IL · 60661

312-775-8000

Christian Z. Karpinski

Reg. 82873

Patent attorney

McDonnell Boehnen Hulbert & Berghoff LLP

Chicago, IL · 60606

312-913-2116

Heather A Kartsounes

Reg. 53732

Patent attorney

Telezygology Inc.

Chicago, IL · 60654

312-751-2800 X 20

Aroon Karuna

Reg. 68335

Patent attorney

IP Spring LLC

Chicago, IL · 60602

630-254-5420

Mario K Kasalo

Reg. 55318

Patent agent

Law Office of J. Nicolas Albukerk

Chicago, IL · 60623

773-847-2600

Devdhi Kasana

Reg. 80764

Patent attorney

K&L Gates LLP

Chicago, IL · 60602

312-807-4332

Bala T S Kasibhatla

Reg. 65438

Patent agent

Vernon Hills, IL · 60061

847-327-9961

Scott R Kaspar

Reg. 54583

Patent attorney

Kaspar Law Company, LLC

Orland Park, IL · 60462

855-527-7271

Chris M Katsantonis

Reg. 78388

Patent agent

DLA Piper LLP (US)

Chicago, IL · 60606

302-368-2127

Alexander T. Katsulis

Reg. 73929

Patent agent

Vernon Hills, IL · 60061

847-345-7725

A Sidney Katz

Reg. 24003

Patent attorney

Husch Blackwell LLP

Chicago, IL · 60606

312-655-1500

James L Katz

Reg. 42711

Patent attorney

Lempia Summerfield Katz LLC

Chicago, IL · 60603

312-854-8372

Martin Lewis Katz

Reg. 25011

Patent attorney

Wood Philips Katz Clark and Mortimer

Chicago, IL · 60661

312-876-2103

Adam M. Kaufmann

Reg. 66276

Patent attorney

Barnes & Thornburg LLP

Chicago, IL · 60606

312-214-8319

Donald Allen Kaul

Reg. 20658

Patent attorney

Chicago, IL · 60611

312-337-1111

Erin M. Kautz

Reg. 78291

Patent attorney

Green, Griffith & Borg-Breen, LLP

Chicago, IL · 60611

312-883-8019

Walter J Kawula· Jr

Reg. 39724

Patent attorney

Hahn Loeser & Parks, LLP

Chicago, IL · 60606

312-637-3050

Susan M Keating

Reg. 41887

Patent attorney

Deerfield, IL · 60015

847-236-0370

Timothy John Keefer

Reg. 35567

Patent attorney

Orland Park, IL · 60462

773-368-3310

Kevin C Keenan

Reg. 65490

Patent attorney

Banner & Witcoff, Ltd.

Chicago, IL · 60606

312-463-5456

Nicole Keenan

Reg. 48622

Patent agent

Jenner & Block

Chicago, IL · 60654

312-222-9350

Thomas Michael Kegel

Reg. 37653

Patent attorney

Miller Cooper & Company Ltd

Deerfield, IL · 60015

847-205-5000

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.