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 Marshall, Gerstein & Borun LLP, Moreno Intellectual Property Law LLC, and Guntin & Gust, PLC.

Top cities in Illinois

All practitioners in Illinois

Christopher Paul Moreno

Reg. 38566

Patent attorney

Moreno Intellectual Property Law LLC

Schaumburg, IL · 60195

312-310-1008

Jason V. Morgan

Reg. 55464

Patent attorney

Guntin & Gust, PLC

Barrington, IL · 60010

872-216-3942

Michael F Morgan

Reg. 42906

Patent attorney

Precision Planting LLC

Tremont, IL · 61568

309-925-5050 EXT 337

Rashad L Morgan

Reg. 60304

Patent attorney

Crowell & Moring LLP

Chicago, IL · 60611

312-321-4200

Rejean Abraham Morgan

Reg. 54322

Patent attorney

Abraham-Morgan LLC

Lake Forest, IL · 60045

224-828-3426

Tristan J. Morgan

Reg. 84264

Patent attorney

McDonnell Boehnen Hulbert & Berghoff LLP

Chicago, IL · 60611

312-913-0001

Sean F Moriarty

Reg. 65446

Patent attorney

Fresenius Kabi

Lake Zurich, IL · 60047

847-550-2760

Monique Ann Morneault

Reg. 37893

Patent attorney

Scherrer Patent & Trademark Law P.C.

Crystal Lake, IL · 60014

815-595-4783

David R Morris

Reg. 53348

Patent agent

Glenview, IL · 60026

847-562-0881

Jeffrey M Morris

Reg. 27458

Patent attorney

Lincolnshire, IL · 60069

847-830-2286

Aaron J Morrow

Reg. 55819

Patent attorney

K&L Gates LLP

Chicago, IL · 60602

312-781-6043

John Stirling Mortimer

Reg. 30407

Patent attorney

Wood Phillips

Chicago, IL · 60661

312-876-2113

Niko A. Moses

Reg. 84888

Patent attorney

Marshall, Gerstein & Borun LLP

Chicago, IL · 60606

312-423-3428

Stanley F Moskal· Jr.

Reg. 57525

Patent agent

Westchester, IL · 60154

708-562-1242

Jeffrey G Mote

Reg. 48791

Patent attorney

Greenberg Traurig, LLP

Chicago, IL · 60601

312-456-8400

Peter G Mott

Reg. 72164

Patent attorney

Chicago, IL · 60611

810-845-5554

Charles Helvetius Mottier

Reg. 30874

Patent attorney

Leydig Voit and Mayer LTD

Chicago, IL · 60601

312-616-5600

Robbie M Mourad

Reg. 69022

Patent attorney

Maxim Legal Advisers

Aurora, IL · 60504

630-854-5135

Rami Naim Moussa

Reg. 69528

Patent attorney

McAndrews, Held & Malloy, Ltd.

Chicago, IL · 60661

312-775-8000

Michael Muczynski

Reg. 48642

Patent attorney

Marshall, Gerstein & Borun LLP

Chicago, IL · 60606

312-474-6300

Lisa V Mueller

Reg. 38978

Patent attorney

Michael Best

Chicago, IL · 60606

312-222-0800

Wesley O Mueller

Reg. 33976

Patent attorney

Leydig Voit &mayer LTD

Chicago, IL · 60601

312-616-5600

Patrick T. Muffo

Reg. 60342

Patent attorney

Polsinelli P.C.

Chicago, IL · 60606

312-873-2988

Konstantinos T Muhtaris

Reg. 62720

Patent agent

Chicago, IL · 60640

847-997-1711

Christopher L. Mulkey

Reg. 66651

Patent attorney

Chicago, IL · 60657

702-281-6950

Elisa Y Muller

Reg. 59015

Patent attorney

Palatine, IL · 60067

773-896-5681

Evan J Muller

Reg. 78063

Patent attorney

Duane Morris LLP

Chicago, IL · 60603-3433

312-499-6709

Jeffrey M Muller

Reg. 45351

Patent attorney

UCS Forest Group

West Chicago, IL · 60185

630-231-0450

Michael F Muller

Reg. 69679

Patent attorney

Palatine, IL · 60067

847-894-6829

Brandon C Munden

Reg. 77995

Patent agent

Chicago, IL · 60660

832-584-8982

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.