Chicago, Illinois

Patent attorneys in Chicago

Chicago, Illinois is home to 1,891 USPTO-registered patent practitioners. Working with a local practitioner can streamline in-person meetings for invention disclosures, signing inventor declarations, and reviewing prior-art search results — but every USPTO practitioner is licensed to practice nationally, so a non-local choice is also valid. Local firms with the most USPTO-registered practitioners include McDonnell Boehnen Hulbert & Berghoff LLP, Department of Pharmacology, and Leydig, Voit & Mayer.

Guoquan Liu

Reg. 67514

Patent agent

Department of Pharmacology

Chicago, IL · 60612

Kevin B Liu

Reg. 77002

Patent attorney

Leydig, Voit & Mayer

Chicago, IL · 60601

312-616-5606

Shuang Liu

Reg. L1405

Limited recognition

Marshall, Gerstein & Borun LLP

Chicago, IL · 60606

312-423-3457

Yonglin Liu

Reg. 68710

Patent agent

K&L Gates LLP

Chicago, IL · 60602

312-807-4316

Yutong Liu

Reg. 902879

Limited recognition

Northwestern Pritzker School of Law

Chicago, IL · 60611

312-900-3029

Justin R. Lizalek

Reg. 82684

Patent attorney

Hanley, Flight & Zimmerman, LLC

Chicago, IL · 60606

312-676-1746

Wan-Shoon Lo

Reg. 71076

Patent attorney

McDermott Will & Emery, LLP

Chicago, IL · 60606

312-984-5810

Matthew E. Loar

Reg. 84550

Patent attorney

Loar Law

Chicago, IL · 60606

224-434-5627

Eric L Lohrenz

Reg. 46016

Patent attorney

Jenner & Block, LLP

Chicago, IL · 60654-3456

312-923-8313

Ronan P Lonergan

Reg. 78665

Patent agent

Banner & Witcoff, Ltd.

Chicago, IL · 60606

312-463-5484

Lauren N. Long

Reg. 81364

Patent agent

Foley & Lardner

Chicago, IL · 60611

630-240-2216

Bradley P. Loren

Reg. 82885

Patent attorney

McAndrews, Held & Malloy

Chicago, IL · 60661

312-775-8009

Caroline S. Lourgos

Reg. 75202

Patent agent

Chicago, IL · 60661

309-840-0374

James L Lovsin

Reg. 69550

Patent attorney

McDonnell Boehnen Hulbert & Berghoff LLP

Chicago, IL · 60606

312-913-0001

Peter E. Loy

Reg. 79189

Patent agent

Banner Witcoff

Chicago, IL · 60606

312-463-5469

Alexander Lu

Reg. 82034

Patent agent

McDonnell Boehnen Hulbert & Bergoff LLP

Chicago, IL · 60606

312-913-2142

Jerry Y Lu

Reg. 79950

Patent agent

McDonnell Boehnen Hulbert & Berghoff LLP

Chicago, IL · 60606

312-913-2011

Ronald V. Lucarelli

Reg. 82720

Patent agent

Buchanan Ingersoll & Rooney PC

Chicago, IL · 60606

312-261-8764

John Kenneth Lucas

Reg. 27024

Patent attorney

Brinks Hofer Gilson & Lione

Chicago, IL · 60610

312-321-4220

Kenneth S. Luchesi

Reg. 58673

Patent attorney

Jones Day

Chicago, IL · 60601-1692

312-782-3939

Jonathan J Luciano

Reg. 73498

Patent attorney

Chicago, IL · 60614

305-215-1382

Cori L Ludwig

Reg. 56973

Patent agent

Trading Technologies International, Inc.

Chicago, IL · 60606

312-476-1069

Lisa M Luedke

Reg. 51151

Patent attorney

Baker and McKenzie

Chicago, IL · 60601

312-861-8616

Sara A Lufrano

Reg. 53245

Patent attorney

Lord, Bissell & Brook, LLP

Chicago, IL · 60606-4410

808-542-7851

James J Lukas· Jr.

Reg. 59114

Patent attorney

Greenberg Traurig, LLP

Chicago, IL · 60601

312-456-8400

Paul J Lukitsch

Reg. 51976

Patent attorney

Seyfarth Shaw Attorneys

Chicago, IL · 60603

312-269-8945

Brian J Lum

Reg. 54282

Patent attorney

Ice Miller

Chicago, IL · 60606

312-726-8129

Jared R. Lund

Reg. 78413

Patent agent

Chicago, IL · 60605

815-985-9362

Kenneth J Luptak

Reg. 65043

Patent attorney

Chicago, IL · 60657

773-220-0663

Joshua J Lustig

Reg. 77904

Patent agent

McDonnell, Boehnen, Hulbert & Berghoff, LLP

Chicago, IL · 60606-6709

224-436-7998

Common questions

Do patent attorneys in Chicago cost more than the national average?

Patent attorney fees vary primarily by experience and complexity of the invention, not by city. A typical provisional patent application in the US runs $1,500 to $5,000; a non-provisional utility filing runs $5,000 to $15,000. Hourly rates in Chicago tend to track the broader Illinois legal market.

How many USPTO practitioners list a Chicago office?

1,891 USPTO-registered patent practitioners list a Chicago mailing address on the OEDCI roster. You can sort by firm size and contact each directly using the phone numbers shown.

Can I work with a Chicago practitioner remotely?

Yes. All filings happen through USPTO's electronic Patent Center — no in-person presence is required. A Chicago-based practitioner is convenient for local inventor signings and in-person meetings but not a requirement for representation.