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 McDonnell Boehnen Hulbert & Berghoff LLP, Zebra Technologies Corporation, and Greer Burns & Crain, Ltd..

Top cities in Illinois

All practitioners in Illinois

Sean R MacDavitt

Reg. 64527

Patent attorney

Zebra Technologies Corporation

Lincolnshire, IL · 60069

631-738-5379

Brittany C MacDonald

Reg. 44159

Patent attorney

Greer Burns & Crain, Ltd.

Chicago, IL · 60606

312-360-0080

Edward Machado

Reg. 58372

Patent attorney

McDonnell Boehnen Hulbert & Berghoff LLP

Chicago, IL · 60606-6709

312-913-2109

Richard A Machonkin

Reg. 41962

Patent attorney

McDonnell Boehnen Hulbert & Berghoff LLP

Chicago, IL · 60606

312-913-0001

Marc D Machtinger

Reg. 43434

Patent attorney

Law Office Of Marc D Machtinger, Ltd.

Buffalo Grove, IL · 60089

847-537-3537

John B MacIntyre

Reg. 41170

Patent attorney

Lucent Technologies, Inc.

Naperville, IL · 60566

630-979-4637

Thyannda M Mack

Reg. 73652

Patent attorney

Dykema Gossett, PLLC

Chicago, IL · 60606

312-627-2126

Corinne D. Macnichol

Reg. 84107

Patent agent

K&L Gates

Chicago, IL · 60602

312-807-4239

Mark A Magas

Reg. 72396

Patent attorney

DUNLAP BENNETT & LUDWIG, PLLC

Chicago, IL · 60601

312-868-0714

Eric S. Magleby

Reg. 80221

Patent attorney

Leydig, Voit & Mayer, Ltd.

Chicago, IL · 60601

312-616-5600

Amy L Mahan

Reg. 75997

Patent attorney

McDermott, Will & Emory

Chicago, IL · 60606

312-984-7742

Edward J Mahan

Reg. 78641

Patent attorney

Wheaton, IL · 60189

231-878-8558

Amanda F Maharaj

Reg. 71595

Patent agent

Cardinal Health

Chicago, IL · 60606

312-270-2003

Ben J Mahon

Reg. 78178

Patent attorney

McAndrews, Held & Malloy

Chicago, IL · 60661

510-506-2970

Joseph A Mahoney

Reg. 38956

Patent attorney

Honigman LLP

Chicago, IL · 60654-4769

312-701-9300

Wassim Mahrouka

Reg. 78830

Patent agent

Downers Grove, IL · 60516

312-451-1382

Eric J Maiers

Reg. 59614

Patent attorney

Greenberg Traurig, LLP

Chicago, IL · 60601

312-456-1036

Dennis A Majewski

Reg. 65578

Patent attorney

K&L Gates LLP

Chicago, IL · 60602-4207

312-807-4329

Jeffery Jay Makeever

Reg. 37390

Patent attorney

Reinhart, Boerner, Van Deuren, P.C.

Rockford, IL · 61107

815-633-5300

Matthew M. Makowski

Reg. 79401

Patent agent

Chicago, IL · 60615

303-981-0810

Charles J Malek

Reg. 58795

Patent agent

North Barrington, IL · 60010

847-381-4796

Monika J. Malek

Reg. 82685

Patent attorney

Vedder Price P.C.

Chicago, IL · 60601

312-609-7686

Noor E Mobeen Malik

Reg. 69135

Patent agent

Hahn Loeser & Park LLP

Chicago, IL · 60606

312-637-3023

Robert Steven Mallin

Reg. 35596

Patent attorney

Brinks Gilson & Lione

Chicago, IL · 60611

312-321-4221

Dennis P Malloy

Reg. 70174

Patent attorney

Methode Electronics, Inc.

Chicago, IL · 60631

170-845-73246

Michael P Malm

Reg. 63276

Patent agent

Wilmette, IL · 60091

201-355-6167

David W Malone

Reg. 44896

Patent agent

Linconshire, IL · 60069

847-883-0013

Timothy Paul Maloney

Reg. 38233

Patent attorney

Fitch, Even, Tabin & Flannery, LLP

Chicago, IL · 60603

312-577-7000

Gregory Jon Mancuso

Reg. 29560

Patent attorney

Riverwoods, IL · 60015

847-945-7034

Michael R Mand

Reg. 74198

Patent attorney

Evanston, IL · 60202

812-219-2306

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.