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 Crowell & Moring LLP, McDonnell Boehnen Hulbert & Berghoff LLP, and Nyman IP LLC.

E. Brandon Nykiel

Reg. 62972

Patent agent

Crowell & Moring LLP

Chicago, IL · 60611

312-321-4200

Scott D. Nyman

Reg. 66215

Patent attorney

Nyman IP LLC

Chicago, IL · 60606

312-487-2532

Grace Law O'Brien

Reg. 48872

Patent attorney

Navteq North America, LLC

Chicago, IL · 60654

Susan A. O'Brien

Reg. 70700

Patent attorney

Jenner & Block LLP

Chicago, IL · 60654

773-372-0170

Terence P O'Brien

Reg. 43840

Patent attorney

Wilson Sporting Goods Co.

Chicago, IL · 60631

773--71-4-6498

Kevin A O'Connor

Reg. 64732

Patent attorney

Neal, Gerber & Elsenberg LLP

Chicago, IL · 60602

312-269-8000

Amanda L. O'Donnell

Reg. 58759

Patent attorney

Fitch, Even, Tabin & Flannery, LLP

Chicago, IL · 60603-3406

312-577-7000

Frank R O'Hare

Reg. 63502

Patent agent

Chicago, IL · 60618

815-474-6232

Gavin J O'Keefe

Reg. 59916

Patent attorney

McDonnell Boehnen Hulbert & Berghoff LLP

Chicago, IL · 60606

312-913-0001

Edward M O'Toole

Reg. 22477

Patent attorney

McCracken & Frank LLP

Chicago, IL · 60606

312-422-5613

William P Oberhardt

Reg. 31861

Patent agent

Olson & Cepuritis

Chicago, IL · 60606

312-580-1180

Adnan Mohamad Obissi

Reg. 75081

Patent attorney

Chicago, IL · 60622

312-848-2773

Paul M Odell

Reg. 28332

Patent attorney

Wood Phillips Katz Clark & Mortimer

Chicago, IL · 60661

312-876-2116

James Matthew Oehler

Reg. 68591

Patent attorney

McDermott Will & Emery

Chicago, IL · 60606

312-899-7277

Douglas A Oguss

Reg. 48469

Patent attorney

Crowell & Moring LLP

Chicago, IL · 60611

312-321-4785

Hyun Oh

Reg. 74479

Patent agent

Chicago, IL · 60605

703-505-1291

Glenn W Ohlson

Reg. 28455

Patent attorney

Barnes & Thornburg LLP

Chicago, IL · 60606

312-357-1313

Arne M Olson

Reg. 30203

Patent attorney

Olson & Cepuritis, Ltd.

Chicago, IL · 60606-3103

312-580-1180

Ragnar Richard Olson

Reg. 58684

Patent attorney

Global IP Law Group, LLC

Chicago, IL · 60603

312-241-1500

Jordan T. One

Reg. 74085

Patent agent

Greenberg Traurig, LLP

Chicago, IL · 60601-1732

312-456-6587

Oliver T Ong

Reg. 58456

Patent attorney

Marshall, Gerstein & Borun, LLP

Chicago, IL · 60606

312-474-6300

Micah R Onixt

Reg. 47834

Patent attorney

Piper Marbury Rudnick and Wolfe

Chicago, IL · 60601

312-368-2141

Anna A. Onley

Reg. 73876

Patent attorney

Chicago, IL · 60625

773-960-2476

David D. Osinski

Reg. 82060

Patent agent

Hanley, Flight, and Zimmerman, LLC

Chicago, IL · 60606

312-580-1020

David N Oskin

Reg. 58863

Patent attorney

Keeper Security, Inc.

Chicago, IL · 60607

708-515-4062

John J Oskorep

Reg. 41234

Patent attorney

Chicago, IL · 60611

312-222-1860

Sherri L Oslick

Reg. 52087

Patent attorney

McDonnell Boehnen Hulbert & Berghoff LLP

Chicago, IL · 60606

312-913-0001

Michael Robert Osterhoff

Reg. 46973

Patent attorney

K&L Gates LLP

Chicago, IL · 60602-4207

312-807-4205

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

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.