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 Lee Sullivan Shea & Smith LLP, Otis Patent Law, and Otto & Associates.

Top cities in Illinois

All practitioners in Illinois

Stephen R Otis

Reg. 64226

Patent attorney

Otis Patent Law

Highland Park, IL · 60035

224-436-9787

Frederick J Otto

Reg. 31553

Patent attorney

Otto & Associates

Park Ridge, IL · 60068

847-698-1160

James Warren Ove· Jr

Reg. 28745

Patent attorney

Law Offices of James Ove Jr

Naperville, IL · 60563

312-300-6761

Philip F. Oweimrin

Reg. 81387

Patent agent

Chicago, IL · 60646

773-595-0631

Patrick J. Owens

Reg. 80250

Patent attorney

Arnold & Porter

Chicago, IL · 60602

312-583-2441

Dallin W. Packard

Reg. 81817

Patent attorney

Lee Sullivan Shea & Smith LLP

Chicago, IL · 60661

312-754-9298

Sun Y Pae

Reg. 61401

Patent attorney

Klintworth & Rozenblat IP LLP

Chicago, IL · 60612-1577

773-570-3330

Preetam B. Pagar

Reg. 57684

Patent attorney

Motorola Solutions, Inc.

Chicago, IL · 60661

847-350-8796

Fatimeh D Pahlavan

Reg. 78064

Patent attorney

Legal Intelligence to Entrepreneurs LLC

Chicago, IL · 60603

312-620-1406

Chad A Pahnke

Reg. 63568

Patent attorney

McAndrews, Held, & Malloy, Ltd.

Chicago, IL · 60661

312-775-8000

Alaina Y. Pak

Reg. 80368

Patent agent

Chicago, IL · 60606

240-370-6796

Ekaterina Pak

Reg. 78196

Patent agent

Chicago, IL · 60611

201-281-9042

Jaeyoung Pak

Reg. 72428

Patent attorney

Lee Sullivan Shea & Smith LLP

Chicago, IL · 60661

312-754-9232

Larry J Palguta

Reg. 29575

Patent attorney

Hanley, Flight & Zimmerman, LLC

Chicago, IL · 60606

312-580-1020

Ann C Palma

Reg. 68168

Patent attorney

HYDY Inc.

Chicago, IL · 60606

312-292-9471

James D Palmatier

Reg. 42972

Patent attorney

Applied Patent Services

Itasca, IL · 60143-0231

630-306-0612

Erick J. Palmer

Reg. 64456

Patent attorney

Honigman LLP

Chicago, IL · 60654

312-429-6065

Mark A Pals

Reg. 44279

Patent attorney

Kirkland & Ellis LLP

Chicago, IL · 60654

312-862-2000

Amrit Panda

Reg. 68672

Patent agent

Amrit Panda

Naperville, IL · 60563

408-394-2578

John S Paniaguas

Reg. 31051

Patent attorney

Clark Hill PLC

Chicago, IL · 60601

312-985-5559

Aliza Panjwani

Reg. 82357

Patent agent

Husch Blackwell

Chicago, IL · 60606

630-890-6210

Bernard A Panone

Reg. 46978

Patent attorney

Knightsbridge Sltns LLC

Chicago, IL · 60661

586-322-3880

Sanjay Pant

Reg. 64865

Patent attorney

Hinsdale, IL · 60521

847-687-1138

Peter D. Papavasiliou

Reg. 60992

Patent attorney

Klein Tools, Inc.

Lincolnshire, IL · 60069

847-821-5695

Giuseppe R Papavero

Reg. 42974

Patent attorney

Curielli & Papavero, Ltd.

Glenview, IL · 60025

847-391-1100

George Christ Pappas

Reg. 35065

Patent attorney

International Motors

Lsile, IL · 60172

224-580-7766

Joseph H Paquin· Jr

Reg. 31647

Patent attorney

Evanston, IL · 60203

847-691-4472

Boris Parad

Reg. 29965

Patent attorney

Parad Law Offices, P.C.

Northbrook, IL · 60062

847-418-2020

Nicole A. Paradiso

Reg. 64081

Patent attorney

Wells Fargo Rail Corporation

Rosemont, IL · 60018

847-384-4464

John P Paredes

Reg. 57364

Patent attorney

Amin Talati & Wasserman

Chicago, IL · 60661

312-784-1061

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.