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 Kirkland & Ellis LLP, McDonnell Boehnen Hulbert & Berghoff LLP, and Perkins Coie LLP.

Top cities in Illinois

All practitioners in Illinois

Thomas L Holt

Reg. 46268

Patent attorney

Perkins Coie LLP

Chicago, IL · 60603

312-324-8438

Jianhui Hong

Reg. 71103

Patent agent

Buffalo Grove, IL · 60089

918-688-8506

Gary E Hood

Reg. 51818

Patent attorney

Hood Legal Group

Chicago, IL · 60606

312-767-7968

Darrick J Hooker

Reg. 53947

Patent attorney

Akerman LLP

Chicago, IL · 60606

312-870-8098

Allen E Hoover

Reg. 37354

Patent attorney

Fitch, Even, Tabin & Flannery, LLP

Chicago, IL · 60603-3406

312-577-7000

Michael J Hopkins

Reg. 75019

Patent attorney

Chicago, IL · 60601

630-596-3680

Nicholas C Hopman

Reg. 38493

Patent agent

Lake Zurich, IL · 60047

224-622-2613

Tadashi Horie

Reg. 40437

Patent attorney

Crowell & Moring

Chicago, IL · 60654

312-321-4200

Sara Tonnies Horton

Reg. 61449

Patent attorney

Willkie Farr & Gallagher

Chicago, IL · 60654

312-728-9000

Barry R. Horwitz

Reg. 68428

Patent attorney

Greenberg Traurig, LLP

Chicago, IL · 60601

312-456-1037

Joseph Nevi Hosteny· III

Reg. 28020

Patent attorney

Joseph Hosteny LLC

Chicago, IL · 60643

773-251-9749

Jeffrey Michael Hoster

Reg. 32240

Patent attorney

Jeffrey M. Hoster Ltd.

Lemont, IL · 60439

630-243-6610

Gretchen Hosty

Reg. 54721

Patent agent

Michael Best & Friedrich, LLP

Chicago, IL · 60601

312-222-0800

Michael R Houston

Reg. 58486

Patent attorney

Foley & Lardner LLP

Chicago, IL · 60610

312-832-4500

Gregory P. Howard

Reg. 83867

Patent agent

Taft Stettinius & Hollister LLP

Chicago, IL · 60601

312-527-4000

Samuel Thomas Howard

Reg. 77688

Patent attorney

McAndrews, Held & Malloy, Ltd.

Chicago, IL · 60661

312-775-8266

Jay B Howd

Reg. 43678

Patent attorney

Law Office of Jay B. Howd

Carbondale, IL · 62901

618-549-1100

Tiffany S. Hu

Reg. 82658

Patent agent

Kirkland & Ellis LLP

Chicago, IL · 60654

713-876-8833

Leonard Z Hua

Reg. 69247

Patent attorney

Leydig, Voit & Mayer, Ltd.

Chicago, IL · 60601-6731

312-616-5600

Lili Huang

Reg. 82054

Patent agent

Venture Partner, LLC

Chicago, IL · 60611

312-840-8228

Meilin Huang

Reg. 76137

Patent agent

Oak Lawn, IL · 60453

414-243-2550

Nolan R Hubbard

Reg. 62327

Patent attorney

K&L Gates LLP

Chicago, IL · 60602-4207

312-781-6017

Peter D. Hudson

Reg. 76591

Patent agent

Johnsburg, IL · 60051

815-701-3713

Reid P Huefner

Reg. 57341

Patent attorney

Hsuanyeh Law Group

Elmhurst, IL · 60126

312-375-6183

Christian E. Huehns

Reg. 77717

Patent attorney

Kirkland & Ellis LLP

Chicago, IL · 60654

312-862-4114

A Blair Hughes

Reg. 32901

Patent agent

McDonnell Boehnen Hulbert & Berghoff LLP

Chicago, IL · 60606

319-913-3200

Kevin G Hughes

Reg. 76085

Patent attorney

Tempus

Chicago, IL · 60654

317-443-2534

Jonathan C Hughley

Reg. 74556

Patent attorney

Marshall, Gerstein & Borun LLP

Chicago, IL · 60606-6357

312-474-6622

Bradley James Hulbert

Reg. 30130

Patent attorney

McDonnell Boehnen Hulbert & Berghoff LLP

Chicago, IL · 60606

312-913-0001

Michael Ridgeway Hull

Reg. 35902

Patent attorney

Miller, Matthias & Hull

Chicago, IL · 60606

312-977-9905

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.