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, IP Law Services, LLC, and Segal McCambridge Singer & Mahoney.

Top cities in Illinois

All practitioners in Illinois

Sharyn K Eklund

Reg. 50446

Patent attorney

Quincy, IL · 62301

217-223-5684

Nader Yacoub El-ziq

Reg. 57932

Patent agent

Chicago, IL · 60604

408-768-8744

Lucy Elandjian

Reg. 46164

Patent attorney

IP Law Services, LLC

Chicago, IL · 60601

617-948-9772

Lamis G. Eli

Reg. 72068

Patent attorney

Segal McCambridge Singer & Mahoney

Chicago, IL · 60606

312-329-6564

Mark A. Elinski

Reg. 84785

Patent agent

Chicago, IL · 60642

248-320-3428

William W Elinski

Reg. 48313

Patent attorney

Chicago, IL · 60611

312-203-7005

Vyacheslav Elkin

Reg. 66913

Patent attorney

Marshall, Gerstein & Borun LLP

Chicago, IL · 60606

312-474-6300

Joshua B Elkins

Reg. 66914

Patent attorney

Chicago, IL · 60613

312-927-6529

Joshua T Elliott

Reg. 43603

Patent attorney

Marshall, Gerstein & Bourn, LLP

Chicago, IL · 60606

312-474-6300

Jennifer J. Embry

Reg. 64972

Patent attorney

Abbott Laboratories

Abbott Park, IL · 60064

224-668-0587

Jay J. Emerick

Reg. 83824

Patent attorney

Kirkland & Ellis LLP

Chicago, IL · 60654

312-862-3772

Brian J Emfinger

Reg. 64670

Patent attorney

Banner & Witcoff, Ltd.

Chicago, IL · 60606-7407

312-463-5000

Jason A Engel

Reg. 51654

Patent attorney

K&L Gates LLP

Chicago, IL · 60602-4207

312-807-4236

Seth C Ensign

Reg. 84735

Patent agent

Decatur, IL · 62521

703-615-3612

Kayla S. Epstein

Reg. 84407

Patent agent

Northbrook, IL · 60062

847-951-8654

Kevin D Erickson

Reg. 38736

Patent attorney

Pauley Petersen Kinne & Erickson

Hoffman Estates, IL · 60169

847-490-1400

Randall Thomas Erickson

Reg. 33872

Patent attorney

Erickson Law Group, PC

Wheaton, IL · 60189

630-665-9404

Patrick D Ertel

Reg. 26877

Patent attorney

Marshall, Gerstein & Borun LLP

Chicago, IL · 60606

312-474-6300

Raymond Nathaniel Ervin

Reg. 51180

Patent agent

Raymond N. Ervin, Ltd.

Buffalo Grove, IL · 60089

847-947-1991

Consuelo Garcia Erwin

Reg. 59085

Patent attorney

Palatine, IL · 60067

847-358-8583

Yusuf Esat

Reg. 64057

Patent attorney

Jenner & Block, LLP

Chicago, IL · 60654-3456

312-840-7654

Seth J Essendrop

Reg. 81875

Patent attorney

McDonnell Boehnen Hulbert & Berghoff LLP

Chicago, IL · 60606

312-913-2100

Leah J. Eubanks

Reg. 72247

Patent agent

Kirkland & Ellis LLP

Chicago, IL · 60654

815--35-3-3357

Carl P Evans· III

Reg. 71453

Patent attorney

Sidley Austin LLP

Chicago, IL · 60603

312-853-7800

Georgia Evans

Reg. 44597

Patent attorney

Riverdale, IL · 60546

708-990-8710

Scott S Evans

Reg. 56187

Patent attorney

Accenture LLP

Chicago, IL · 60601

312-693-6131

Steven M Evans

Reg. 35503

Patent attorney

Chicago IP Law

Naperville, IL · 60567

630-544-9395

Douglas M Eveleigh

Reg. 43426

Patent attorney

Solo Cup Company

Highland Park, IL · 60035

847-579-3479

Andrew M Everest

Reg. 44674

Patent attorney

Chicago, IL · 60647

773-772-1500

Kelsey Anne Ewing

Reg. 78303

Patent attorney

Caterpillar Inc.

Peoria, IL · 61529

706-641-5393

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.