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 Marshall, Gerstein & Borun LLP, Kirkland & Ellis LLP, and Amin Talati & Upadhye, LLC.

Top cities in Illinois

All practitioners in Illinois

Nikhil R. Krishnan

Reg. 68879

Patent attorney

Kirkland & Ellis LLP

Chicago, IL · 60654

312-862-2323

Jonathan Jacob Krit

Reg. 37164

Patent attorney

Amin Talati & Upadhye, LLC

Chicago, IL · 60606

312-466-1033

James John Kritsas

Reg. 71714

Patent attorney

Morgan, Lewis & Bockius LLP

Chicago, IL · 60601

312-324-1109

Michael A Krol

Reg. 50821

Patent attorney

Welsh & Katz, Ltd.

Chicago, IL · 60606

312-655-1500

Tessa M. Kroll

Reg. 79327

Patent attorney

Caterpillar Inc.

Peoria, IL · 61529

309-494-2088

Jakub Mikolaj Krynski

Reg. 65650

Patent agent

Chatham, IL · 62629

847-809-8283

Linda A Kuczma

Reg. 30861

Patent attorney

Park Ridge, IL · 60068

312-505-3399

Stephen J Kudla

Reg. 78390

Patent attorney

Marshall, Gerstein & Borun LLP

Chicago, IL · 60606-6357

312-474-9569

Jean D Kuelper

Reg. 30171

Patent attorney

McAndrews Held and Malloy LTD

Chicago, IL · 60661

312-775-8000

Mateusz J. Kulesza

Reg. 74965

Patent attorney

McDonnell Boehnen Hulbert & Berghoff LLP

Chicago, IL · 60606

312-913-3362

Raguraman Kumaresan

Reg. 80201

Patent attorney

Motorola Solutions, Inc.

Chicago, IL · 60661

847-306-6866

Thomas D. Kunnasery

Reg. 83531

Patent attorney

McAndrews, Held & Malloy

Chicago, IL · 60661

952-356-5421

Philip A. Kunz

Reg. 62290

Patent attorney

K&L Gates LLP

Chicago, IL · 60602-4207

312-807-4294

Jason T. Kunze

Reg. 65691

Patent attorney

Nixon Peabody LLP

Chicago, IL · 60602

312-425-3973

Joseph Ming Kuo

Reg. 38943

Patent attorney

Arnstein & Lehr, LLP

Chicago, IL · 60606

312-876-7151

Jennifer M Kurcz

Reg. 54481

Patent attorney

Baker & Hostetler LLP

Chicago, IL · 60606

312-416-6286

Minoru Kurose

Reg. 77582

Patent agent

Komatsu America

Peoria, IL · 61639

309-561-4362

Christopher M. Kurpinski

Reg. 68339

Patent attorney

CCC Intelligent Solutions, Inc.

Chicago, IL · 60607

800-621-8070

Tara L Kurtis

Reg. 74846

Patent attorney

Perkins Coie LLP

Chicago, IL · 60606

312-324-8607

Donna Kwon

Reg. 79061

Patent attorney

Mayer Brown

Chicago, IL · 60606

312-203-9323

Michael J Kyle

Reg. 63733

Patent attorney

Cook Alex Ltd.

Chicago, IL · 60606

312-236-8500

Mark Francis La Marre

Reg. 34856

Patent attorney

Cardinal Law Group

Evanston, IL · 60201

847-905-7120

Indhira Anna La Puma

Reg. 58370

Patent attorney

Deere and Company

Moline, IL · 61265

309-748-6495

Richard M LaBarge

Reg. 32254

Patent attorney

Marshall, Gerstein & Borun LLP

Chicago, IL · 60606

312-474-6300

John R Labbe

Reg. 53171

Patent attorney

Marshall, Gerstein & Borun LLP

Chicago, IL · 60606

312-474-6300

Laura A. Labeots

Reg. 62235

Patent attorney

LathropGage LLP

Chicago, IL · 60606-1787

312-920-3357

Kenneth D Labudda

Reg. 41134

Patent attorney

Lake Zurich, IL · 60047

847-438-2578

Ron J Laby

Reg. 53173

Patent agent

DENTONS US LLP

Chicago, IL · 60606-1080

214-259-0932

Jennifer E Lacroix

Reg. 46852

Patent attorney

Amundsen Davis

Chicago, IL · 60601

312-455-3863

Charles Alan Laff

Reg. 19787

Patent attorney

Michael Best & Friedrich LLP

Chicago, IL · 60606

312-222-0800

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.