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 Northwestern Pritzker School of Law, Jones Day, and McAndrews, Held & Malloy, Ltd..

Top cities in Illinois

All practitioners in Illinois

Kobe Mandell

Reg. 902880

Limited recognition

Northwestern Pritzker School of Law

Chicago, IL · 60611

847-274-5434

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

John Addison Marlott

Reg. 37031

Patent attorney

Jones Day

Chicago, IL · 60606

312-269-4236

Christopher K Marlow

Reg. 55427

Patent attorney

Panduit Corp.

Tinley Park, IL · 60487

708-532-1800 X81302

Christopher Marquez

Reg. 902881

Limited recognition

Northwestern Pritzker School of Law

Chicago, IL · 60611

815-258-1853

David J Marr

Reg. 32915

Patent attorney

Clark Hill PLC

Chicago, IL · 60601

312-955-5558

Matthew E. Marrone

Reg. 68431

Patent attorney

McAndrews, Held & Malloy, Ltd.

Chicago, IL · 60661

312-775-8000

Diane Lyn Marschang

Reg. 35600

Patent attorney

Kenilworth, IL · 60043

847-251-3510

Robert Louis Marsh

Reg. 25894

Patent attorney

Wheaton, IL · 60187

630-681-7500

Alice O Martin

Reg. 35601

Patent attorney

Barnes & Thornburg, LLP

Chicago, IL · 60606

312-214-8316

Allyson M. Martin

Reg. 72610

Patent attorney

Greer, Burns & Crain Ltd.

Chicago, IL · 60606

312-987-2914

Eric P Martin

Reg. 48280

Patent attorney

Wilmette, IL · 60091

847-256-2362

Matthew Eric Martin

Reg. 53274

Patent agent

Foley & Lardner LLP

Chicago, IL · 60610

312-832-4559

Michael Blain Martin

Reg. 37521

Patent attorney

MB MARTIN LLC

Aurora, IL · 60598

630-605-6782

Richard W Martin

Reg. 72543

Patent attorney

McDonnell, Boehnen, Hulbert & Berghoff

Chicago, IL · 60606

312-913-2101

Ronald B Martin

Reg. 55431

Patent agent

Carol Stream, IL · 60188

630-309-2464

Brittany M. Martinez

Reg. 73118

Patent attorney

Ambir Technology, Inc.

Wood Dale, IL · 60191

708-704-6393

Edward Anthony Mas· II

Reg. 37179

Patent attorney

McAndrews, Held & Malloy, Ltd.

Chicago, IL · 60661

312-775-8000

Martin S Masar· III

Reg. 62007

Patent attorney

Katten Muchin Rosenman LLP

Chicago, IL · 60661-3693

312-902-5616

Adam Hugh Masia

Reg. 35602

Patent attorney

Neal, Gerber & Eisenberg, LLP

Chicago, IL · 60602

312-269-8048

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.