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 Mayer Brown and Platt, Motorola Solutions, Inc., and MBHB.

Top cities in Illinois

All practitioners in Illinois

Brian T May

Reg. 46907

Patent attorney

Mayer Brown and Platt

Chicago, IL · 60603

312-782-0600

Steven A May

Reg. 44912

Patent attorney

Motorola Solutions, Inc.

Chiago, IL · 60618

773-477-2341

Alejandro Mayagoitia Hernandez

Reg. 84392

Patent agent

MBHB

Chicago, IL · 60606

312-913-3390

Andrew J Mayer

Reg. 57873

Patent attorney

Downers Grove, IL · 60515

630-776-0279

Gregory Charles Mayer

Reg. 38238

Patent attorney

Becton, Dickinson and Company

Vernon Hills, IL · 60061

602-830-5283

Israel S Mayergoyz

Reg. 47778

Patent agent

Jones Day

Chicago, IL · 60601-1692

312-269-1572

Michael Christopher Mayo

Reg. 38545

Patent attorney

Baxalta US Inc.

Bannockburn, IL · 60015

224-940-2136

Susan V Mazurek

Reg. 77749

Patent attorney

Chicago, IL · 60606

000-000-0000

Michael P Mazza

Reg. 34092

Patent attorney

Michael P. Mazza, LLC

Glen Ellyn, IL · 60137

630-858-5071

Deanne M Mazzochi

Reg. 50158

Patent attorney

Rakoczy Molino Mazzochi Siwik LLP

Chicago, IL · 60610

312-222-6305

Eric P McAlpine

Reg. 46908

Patent attorney

Groupon, Inc.

Chicago, IL · 60137

312-662-6512

Paul W McAndrews

Reg. 62966

Patent attorney

McAndrews, Held & Malloy, Ltd.

Chicago, IL · 60661

312-775-8000

Peter John McAndrews

Reg. 38547

Patent attorney

McAndrew Held & Malloy, Ltd.

Chicago, IL · 60661

312-775-8000

Scott Patrick McBride

Reg. 42853

Patent attorney

McAndrews Held and Malloy, Ltd.

Chicago, IL · 60661

312-775-8000

Robert Alan McCann

Reg. 35606

Patent attorney

Panduit Corp.

Tinley Park, IL · 60487

708-532-1800 X 81302

James M McCarthy

Reg. 39296

Patent attorney

Norvell IP llc

Chicago, IL · 60604

773-729-2239

Timothy M McCarthy

Reg. 42855

Patent attorney

Chicago, IL · 60601

312-985-5561

Richard T McCaulley· Jr

Reg. 41977

Patent attorney

McCaulley Law Group

Deer Park, IL · 60010

312-858-1105

Joseph P McCollum

Reg. 78593

Patent attorney

Banner Witcoff

Chicago, IL · 60606

312-463-5000

Kevin T McCormick

Reg. 72671

Patent attorney

K&L Gates, LLP

Chicago, IL · 60602

312-807-4335

Mark Alan McCormick

Reg. 53295

Patent attorney

Olney, IL · 62450

630-388-8797

William E McCracken

Reg. 30195

Patent attorney

McCracken & Gillen LLC

Oak Brook, IL · 60523

630-286-7600

William F McDermott

Reg. 29954

Patent attorney

Chicago, IL · 60614

312-721-7563

Frank B McDonald

Reg. 28738

Patent attorney

Miller Matthias & Hull, LLP

Chicago, IL · 60606

312-977-9902

Scott Paul McDonald

Reg. 34871

Patent attorney

Hinsdale, IL · 60521

630-207-2090

Michael P McDonough

Reg. 41981

Patent attorney

US Environmental Protection Agency

Chicago, IL · 60604

312-886-1550

Thomas C McDonough

Reg. 33734

Patent attorney

Neal, Gerber & Eisenberg, LLP

Chicago, IL · 60602

312-269-5282

Annette Michele McGarry

Reg. 34671

Patent attorney

McGarry & McGarry, LLC

Chicago, IL · 60612

312-345-4600

Michael J McGee

Reg. 43789

Patent attorney

Cook Alex McFarron Manzo Cummings

Chicago, IL · 60606

312-236-8500

Richard Joseph McGillivray

Reg. 51347

Patent agent

Mt Zion, IL · 62549

217-412-2091

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.