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 Taft Stettinius & Hollister LLP, Tony T Shu and Assocs, and ADM.

Top cities in Illinois

All practitioners in Illinois

Roshan P Shrestha

Reg. 71277

Patent attorney

Taft Stettinius & Hollister LLP

Chicago, IL · 60601-3713

312-527-4000

Alex Shtraym

Reg. 74172

Patent attorney

Chicago, IL · 60605

847-529-2539

Tony Tso-Wan Shu

Reg. 30135

Patent attorney

Tony T Shu and Assocs

Chicago, IL · 60604

312-641-3303

Rishi Shukla

Reg. 58985

Patent agent

ADM

Decatur, IL · 62525

217-451-2868

Jason S Shull

Reg. 47085

Patent attorney

Banner & Witcoff, Ltd.

Chicago, IL · 60606

312-463-5423

Alvin David Shulman

Reg. 19412

Patent attorney

Marshall, Gerstein & Borun LLP

Chicago, IL · 60606-6357

312-474-6300

Daniel H Shulman

Reg. 45106

Patent attorney

Vedder Price P.C.

Chicago, IL · 60601

312-609-7530

Jon D Shutter

Reg. 41311

Patent attorney

HERE North America, LLC

Chicago, IL · 60606

224-623-5643

Peter M Siavelis

Reg. 51136

Patent attorney

McDermott Will Emery LLP

Chicago, IL · 60606-5096

312-984-2000

Jonathan R Sick

Reg. 43920

Patent attorney

McAndrews Held and Malloy, Ltd.

Chicago, IL · 60661

312-775-8000

Dugal Smith Sickert

Reg. 33784

Patent attorney

Valent Biosciences Corporation

Libertyville, IL · 60048

847-968-4710

Nawshaba M Siddiquee

Reg. 63742

Patent attorney

Neal, Gerber & Eisenberg LLP

Chicago, IL · 60602

312-269-8000

Troy J Sieburg

Reg. 68280

Patent attorney

Beem Patent Law Firm

Chicago, IL · 60604

312-201-0011

Joel E Siegel

Reg. 25440

Patent attorney

Wood, Phillips ET. AL.

Chicago, IL · 60661

312-876-2101

William R. Siegel

Reg. 62681

Patent attorney

Pauley Petersen & Erickson

Hoffman Estates, IL · 60169

847-490-1400

Amy L Sierocki

Reg. 54447

Patent attorney

Chicago, IL · 60602

312-977-4400

Jordan A Sigale

Reg. 39028

Patent attorney

Porter Wright Morris & Arthur LLP

Chicago, IL · 60654

312-756-8468

Leif R Sigmond· Jr

Reg. 35680

Patent attorney

Baker &Hostetler LLP

Chicago, IL · 60606

312-416-6200

Amy L Signaigo

Reg. 67681

Patent attorney

McGuireWoods LLP

Chicago, IL · 60601-1818

312-849-8141

Michael T. Sikora

Reg. 78013

Patent attorney

Morgan Lewis & Bockius, LLP

Chicago, IL · 60601

312-324--1482

Aleksas D. Siliunas

Reg. 79826

Patent attorney

Lisle, IL · 60532

630-709-3801

Gustavo Siller· Jr

Reg. 32305

Patent attorney

Brinks Gilson & Lione

Chicago, IL · 60611

312-321-4249

Franklin P. Silverman

Reg. 81504

Patent agent

AbbVie Inc.

North Chicago, IL · 60064

847-937-0409

Howard Earl Silverman

Reg. 32492

Patent attorney

Greenberg Traurig, LLP

Chicago, IL · 60601

312-456-5202

Peter J Silverman

Reg. 77563

Patent agent

ASSIA

Evanston, IL · 60202-3220

847-226-5069

Donald J Silvert

Reg. 37552

Patent attorney

Silvert IP Law, PC

Northbrook, IL · 60065

847-834-9764

Emer L Simic

Reg. 61235

Patent attorney

Green, Griffith & Borg-Breen, LLP

Chicago, IL · 60611

312-883-8017

Viktor Simkovic

Reg. 56012

Patent agent

Fitch, Even, Tabin & Flannery LLP

Chicago, IL · 60603

312-577-7000

Federico Simone

Reg. 59457

Patent attorney

Chicago, IL · 60626

312-363-8852

Raymond B. Simons

Reg. 68363

Patent attorney

River Forest, IL · 60305

708-912-3894

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.