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 Fitch, Even, Tabin & Flannery, LLP, Cardinal Health, and McAndrews, Held & Malloy.

Top cities in Illinois

All practitioners in Illinois

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

Anshul Mangal

Reg. 64684

Patent attorney

Chicago, IL · 60614

773-531-2120

Samantha L Mangoni

Reg. 83625

Patent agent

Jones Day

Chicago, IL · 60607

312-782-3939

Oona Anne Manzari

Reg. 48152

Patent attorney

AbbVie Inc

North Chicago, IL · 60064

847-936-6475

Edward David Manzo

Reg. 28139

Patent attorney

Husch Blackwell LLP

Chicago, IL · 60606

312-985-1535

Karina R Marciani

Reg. 55426

Patent attorney

Nature's Fynd

Chicago, IL · 60609

833-517-2477

Joseph Robert Marcus

Reg. 25060

Patent attorney

Chicago, IL · 60657

773-832-0078

Neal David Marcus

Reg. 35267

Patent attorney

Chicago, IL · 60601

650-492-5008

Patrick J. Mardula

Reg. 79520

Patent attorney

Hinsdale, IL · 60521

630-743-3309

John J. Mariane· IV

Reg. 79672

Patent attorney

Marshall Gerstein & Borun LLP

Chicago, IL · 60606

312-423-3438

Joseph F Marinelli

Reg. 46898

Patent attorney

Fitch, Even, Tabin & Flannery, LLP

Chicago, IL · 60603-3406

312-577-7000

Jacob Benjamin Marks

Reg. 61015

Patent attorney

Marks IP Law

Chicago, IL · 60613

512-789-5787

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.