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 United States Department of Energy, Neal, Gerber & Eisenberg, LLP, and Akzo Nobel Inc..

Top cities in Illinois

All practitioners in Illinois

Aaron R Keith

Reg. 72089

Patent attorney

United States Department of Energy

Lemont, IL · 60439

847-809-2045

Michael G Kelber

Reg. 41111

Patent attorney

Neal, Gerber & Eisenberg, LLP

Chicago, IL · 60602

312-269-8000

Matthew David Kellam

Reg. 48442

Patent attorney

Akzo Nobel Inc.

Chicago, IL · 60607

312--54-4-7000

Hughie C Kellner

Reg. 79875

Patent agent

Leydig, Voit & Mayer, Ltd.

Chicago, IL · 60601-6745

312-616-5600

Adam G Kelly

Reg. 54937

Patent attorney

Leob & Loeb LLP

Chicago, IL · 60610

312-464-3038

Matthew J Kelly

Reg. 42716

Patent attorney

Chicago Mercantile Exchange, Inc.

Chicago, IL · 60606

312-930-3046

Paula J Kelly

Reg. 37624

Patent attorney

Mars Wrigley

Chicago, IL · 60642

773-703-7113

Allison R. Kemph

Reg. 84187

Patent agent

Arlington Heights, IL · 60004

224-456-7455

Michael Louis Kenaga

Reg. 34639

Patent attorney

IpHorgan Ltd.

Buffalo Grove, IL · 60089-1768

847-808-5500

John Sheldon Kendall

Reg. 36839

Patent attorney

Davis & Kendall, PC

Chicago, IL · 60606

312-857-1997

Brandon J Kennedy

Reg. 67894

Patent attorney

Lee Sullivan Shea & Smith LLP

Chicago, IL · 60661

312-754-9602

Dolores Torres Kenney

Reg. 31269

Patent attorney

Olson & Cepuritis, Ltd.

Chicago, IL · 60606

312-580-1180

Jane Pearse Kerber

Reg. 28654

Patent attorney

Urbana, IL · 61801

877-205-6610

John A Kerrigan

Reg. 71303

Patent attorney

Chicago, IL · 60614

312-217-6363

Jay Kesan

Reg. 37488

Patent attorney

Champaign, IL · 61821

217-333-7887

Jacqueline A Kett

Reg. 83508

Patent attorney

K&L Gates

Chicago, IL · 60602

312-807-4286

Samantha M. Keyport Kik

Reg. 84548

Patent agent

Morgan Lewis & Bockius, LLP

Chicago, IL · 60606

312-324-1559

Amin S Khan

Reg. 55802

Patent agent

Bartlett, IL · 60103

Momina M. Khan

Reg. 82760

Patent attorney

Chicago, IL · 60654

815-793-3533

Zakia I. Khan

Reg. 66365

Patent attorney

Palatine, IL · 60074

847-951-0374

Manoj J Khandekar

Reg. 46824

Patent agent

Wildman Harrold Allen & Dixon, LLP

Chicago, IL · 60606

312-201-2000

Umang Khanna

Reg. 77992

Patent agent

Navistar, Inc.

Lisle, IL · 60532

331-332-1348

Vladimir Khodosh

Reg. 56967

Patent attorney

Kirkland & Ellis LLP

Chicago, IL · 60654

312-862-2107

Kourosh C Khosravi

Reg. 40375

Patent attorney

Law Offices Of K. Cyrus Khosravi

Arlington Hts., IL · 60005

818-209-3242

Maryam Khotani

Reg. 51874

Patent attorney

AbbVie Inc.

North Chicago, IL · 60064

Steven Gregory Kibby

Reg. 35215

Patent attorney

Caterpillar Inc.

Peoria, IL · 61629-6450

309-675-5140

Kristopher R Kiel

Reg. 46825

Patent attorney

Jenner & Block, LLC

Chicago, IL · 60611

312-840-7283

Philip Harvey Kier

Reg. 28866

Patent attorney

Oak Park, IL · 60302

708-386-5981

Patrick C Kilgore

Reg. 69131

Patent attorney

Chicago, IL · 60660

555-555-5555

John Kilyk· Jr

Reg. 30763

Patent attorney

Leydig Voit and Mayer LTD

Chicago, IL · 60601

312-616-5600

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.