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 Jones Day, Kirkland & Ellis, LLP, and Banner and Witcoff, Ltd..

Top cities in Illinois

All practitioners in Illinois

James B Medek

Reg. 70845

Patent attorney

Kirkland & Ellis, LLP

Chicago, IL · 60654

312-862-2000

Adrian Mederos

Reg. 77151

Patent agent

Arlington Heights, IL · 60005

305-607-9841

Sarah T. Meece

Reg. 84108

Patent agent

Burr Ridge, IL · 60527

630-247-8303

Timothy Colin Meece

Reg. 38553

Patent attorney

Banner and Witcoff, Ltd.

Chicago, IL · 60606

312-463-5000

Harold J. Meerbaum

Reg. 59753

Patent attorney

Greer, Burns & Crain, Ltd.

Chicago, IL · 60606-6771

312-360-0080

Richard Burns Megley· Jr

Reg. 41992

Patent attorney

Glenview, IL · 60026

847-834-0438

Raymond Melvin Mehler

Reg. 26306

Patent attorney

Cook Alex Ltd.

Chicago, IL · 60606

312-236-8500

Hersh H Mehta

Reg. 62336

Patent attorney

Morgan, Lewis & Bockius LLP

Chicago, IL · 60601

312-324-1739

Manish K. Mehta

Reg. 64570

Patent attorney

Benesch Friedlander Coplan & Aronoff LLP

Chicago, IL · 60606

312-212-4953

Rachel J Mejdrich

Reg. 53477

Patent agent

Leydig Voit and Mayer Ltd

Chicago, IL · 60601

312-616-5600

August M Melcher

Reg. 78644

Patent attorney

Locke Lord LLP

Chicago, IL · 60606

952-221-3136

Emily C. Melvin

Reg. 66586

Patent attorney

Latham & Watkins LLP

Chicago, IL · 60611

312-876-7700

Vicki S Menard

Reg. 38554

Patent attorney

March & McLennan Companies

Vernon Hills, IL · 60061

847-549-4849

Alejandro Menchaca

Reg. 34389

Patent attorney

McAndrews Held and Malloy LTD

Chicago, IL · 60661

312-775-8000

Elliot C Mendelson

Reg. 42878

Patent agent

N. Barrington, IL · 60010

312-375-7844

William K Merkel

Reg. 40725

Patent attorney

Marshall, Gerstein & Borun LLP

Chicago, IL · 60606

312-474-6300

Joel R Merkin

Reg. 58600

Patent attorney

Kirkland & Ellis LLP

Chicago, IL · 60654

312-862-2000

Louay K. Meroueh

Reg. 81304

Patent attorney

Chicago, IL · 60661

313-909-0799

Ayhan E. Mertogul

Reg. 63977

Patent attorney

Nixon Peabody LLP

Chicago, IL · 60602-4378

312-977-9230

Jeffrey S. Messing

Reg. 81690

Patent attorney

Jones Day

Chicago, IL · 60606

312-269-1542

Robert T Metz

Reg. 55928

Patent agent

Tinley Park, IL · 60477

708-532-3761

David R Metzger

Reg. 32919

Patent attorney

Dentons US LLP

Chicago, IL · 60606-1080

312-876-8000

Jonathan Paul Meyer

Reg. 30477

Patent attorney

Motorola Solutions, Inc.

Schaumburg, IL · 60196

847-538-3268

Kathleen A Meyer

Reg. 66006

Patent attorney

McAndrews, Held & Malloy, Ltd.

Chicago, IL · 60661

312-775-8167

Emily Miao

Reg. 35285

Patent attorney

McDonnell Boehnen Hulbert & Berghoff LLP

Chicago, IL · 60606

312-913-0001

Brian R Michalek

Reg. 65816

Patent attorney

Saul Ewing Arnstein & Lehr

Chicago, IL · 60601

312-876-7836

John M Michalik

Reg. 56914

Patent attorney

Jones Day

Chicago, IL · 60601-1692

312-269-4215

Randy R Micheletti

Reg. 54310

Patent attorney

Incubate IP

Glen Ellyn, IL · 60137

312-600-5412

Michael W Mihm

Reg. 34222

Patent attorney

Mihm Legal Services

Rock Island, IL · 61201

309-236-6854

Danka Milic

Reg. 73189

Patent attorney

SpencePC

Chicago, IL · 60611

312-637-3494

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.