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 Suresh B. Pillai, Leydig Voit and Mayer, Ltd., and Marshall, Gerstein & Borun.

Top cities in Illinois

All practitioners in Illinois

Suresh B Pillai

Reg. 62726

Patent attorney

Suresh B. Pillai

Chicago, IL · 60616

773-230-5954

Xavier Pillai

Reg. 39799

Patent attorney

Leydig Voit and Mayer, Ltd.

Chicago, IL · 60601

312-616-5600

Ananya Pillutla

Reg. 78313

Patent agent

Marshall, Gerstein & Borun

Chicago, IL · 60606

312-474-6300

Eligio Cerda Pimentel

Reg. 42076

Patent attorney

McAndrews Held and Malloy, Ltd.

Chicago, IL · 60661

312-775-8000

Jeffrey A Pine

Reg. 36893

Patent attorney

Patzik, Frank & Samotny Ltd.

Chicago, IL · 60606

312-551-8300

Janet A Pioli

Reg. 35323

Patent attorney

Karnes Law Chartered

Chicago, IL · 60601

312-371-1299

Michael Piontek

Reg. 25605

Patent attorney

Chicago, IL · 60614

312-206-5435

Kevin J. Piotrowski

Reg. 78358

Patent agent

Marshall, Gerstein & Borun LLP

Chicago, IL · 60606

312-474-9567

Justin L Piper

Reg. 59227

Patent agent

Chicago, IL · 60615

773-752-3767

Rebecca P. Piper

Reg. 64457

Patent attorney

Kirkland & Ellis, LLP

Chicago, IL · 60654

312-862-7116

Robert Matthew Pipke

Reg. 41413

Patent attorney

Venture Gain LLC

Naperville, IL · 60563

800-516-7902

Phillip McKinney Pippenger· Jr

Reg. 46055

Patent attorney

McKinney Phillip LLC

Chicago, IL · 60607

847-738-1132

Sara M. Pistilli

Reg. 82287

Patent attorney

Katten Muchin Rosenman LLP

Chicago, IL · 60661-3693

312-902-5681

Kyle A. Planck

Reg. 83355

Patent agent

Blank Rome LLP

Chicago, IL · 60606

312-776-2588

Troy L. Plattner

Reg. 73055

Patent attorney

Superior Industries

Pekin, IL · 61554

309-453-3251

Gregory Thomas Pletta

Reg. 47864

Patent attorney

Nanosphere, Inc.

Northbrook, IL · 60062-1829

847-400-9020

Kelly A Plummer

Reg. 65452

Patent attorney

Morgan, Lewis & Bockius LLP

Chicago, IL · 60601

312-324-1490

Robert Gary Pluta

Reg. 50970

Patent attorney

Mayer Brown LLP

Chicago, IL · 60606

312-701-8641

Donald John Pochopien

Reg. 32167

Patent attorney

Long Grove, IL · 60047

847-566-5765

Julius Pohlenz

Reg. 44378

Patent attorney

Goss International Corp.

Bolingbrook, IL · 60440

630-755-9280

Joseph A Policarpio

Reg. 77558

Patent agent

Urbana, IL · 61801

925-510-0790

Robert Brian Polit

Reg. 33993

Patent attorney

The Polit IP Law Group, Ltd.

Wheaton, IL · 60189

312-203-4047

John D Polivick

Reg. 57926

Patent attorney

Highland Park, IL · 60035

314-956-7491

Rachel Ann Polster

Reg. 47004

Patent attorney

Abbott Laboratories

Abbott Park, IL · 60064-6008

847-937-0107

Mark V Polyakov

Reg. 54377

Patent attorney

Wood Phillips Katz Clark & Mortimer

Chicago, IL · 60661-2562

312-876-2110

Anthoula Pomrening

Reg. 38805

Patent attorney

Illinois Tool Works Inc.

Glenview, IL · 60025

224-661-7722

Jennifer M Pope

Reg. 53311

Patent attorney

McDonnell Boehnen Hulbert & Berghoff, LLP

Chicago, IL · 60606

312-913-2101

Jonathan S Pope

Reg. 67431

Patent agent

Mt. Prospect, IL · 60056

847-630-4179

William Patrick Porcelli

Reg. 16734

Patent attorney

Chicago, IL · 60643

Priscilla Eileen Porembski

Reg. 33207

Patent agent

Prospect Heights, IL · 60070

224-595-9791

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.