Washington

Patent attorneys in Washington

Washington hosts 1,446 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 Washington. 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 PATH, Seed Intellectual Property Law Group LLP, and Kilpatrick Townsend & Stockton LLP.

Top cities in Washington

All practitioners in Washington

Linda J Nyari

Reg. 30968

Patent attorney

PATH

Seattle, WA · 98121

206-302-4858

Daniel P. O'Brien

Reg. 65545

Patent attorney

Seed Intellectual Property Law Group LLP

Seattle, WA · 98104-70604

206-622-4900

Bruce E O'Connor

Reg. 24849

Patent attorney

Seattle, WA · 98121

206-852-9265

Thomas J. O'Connor

Reg. 81503

Patent agent

Kilpatrick Townsend & Stockton LLP

Seattle, WA · 98106

816-729-9349

Sean William O'Dea

Reg. 37690

Patent attorney

Bellevue, WA · 98008

425-445-6162

Francis P. O'Neill

Reg. 71750

Patent agent

Creative Patent

Bellingham, WA · 98225

505-310-3776

Shayne E. O'Reilly

Reg. 58765

Patent attorney

Liberty Lake, WA · 99019

336-253-6560

James L. O'Sullivan

Reg. 65618

Patent agent

CKC & Partners Co., LLC

Seattle, WA · 98125

888-388-6609

Cera E. Oh

Reg. 79275

Patent attorney

Apex Juris, PLLC

Edmonds, WA · 98020

818-321-2903

Zhi-Xiang Oh

Reg. 67520

Patent attorney

Bristol Myers Squibb

Seattle, WA · 98109

206-245-8197

Tsuyoshi Ohyama

Reg. 70813

Patent agent

Kirkland, WA · 98034

415-497-9646

Robert Yoichi Oikawa

Reg. 57982

Patent agent

The Oikawa Group, LLP

Redmond, WA · 98052

425-882-2350

Qudus B Olaniran

Reg. 61956

Patent attorney

Microsoft Corporation

Redmond, WA · 98052-6399

425-421-4231

Polly L Oliver

Reg. 42050

Patent attorney

Oliver Law Firm, PS Inc.

Seattle, WA · 98124

253-221-0374

Andrew C Olmsted

Reg. 63772

Patent attorney

Olmsted Law, PLLC

Gig Harbor, WA · 98329

206-651-5066

Jonathan E Olson

Reg. 41231

Patent attorney

Olson Legal LLC

Bellevue, WA · 98008

425-341-3418

Ken W. Olson

Reg. 67026

Patent agent

Newcastle, WA · 98059

425-526-5228

Thomas A Olson

Reg. 44271

Patent attorney

Spokane, WA · 99209-1005

509-327-4748

Kevin S. Ormiston

Reg. 75003

Patent attorney

Foster Pepper PLLC

Seattle, WA · 98101

206-447-6271

David E Orr

Reg. 44988

Patent agent

Vancouver, WA · 98661

360-521-9756

Mareval M. Ortiz Camacho

Reg. 81487

Patent agent

Davis Wright Tremaine LLP

Seattle, WA · 98104

206-757-8118

Dawson J Osborn

Reg. 79099

Patent attorney

Spokane, WA · 99203

307-752-1012

Jeffrey B Oster

Reg. 32585

Patent attorney

Troll Busters LLC

Mercer Island, WA · 98040

206-713-5467

Neil A. Ostroff

Reg. 71609

Patent agent

Kirkland, WA · 98034

206-390-2119

Joshua D. Ottosen

Reg. 80423

Patent attorney

FIG. 1 Patents, PLLC

Spokane, WA · 99201

509-321-6423

Jeffrey R Ouimet

Reg. 57362

Patent attorney

Ouimet Law Offices

Bothell, WA · 98012

206-617-1876

Cory N Owan

Reg. 79841

Patent attorney

Perkins Coie LLP

Seattle, WA · 98101-3099

206-359-6047

Ajeet P. Pai

Reg. 66119

Patent attorney

Amazon.com, Inc.

Seattle, WA · 98121

206-740-7776

Chao-Chang David Pai

Reg. 51195

Patent attorney

Pai Patent & Trademark Law Firm

Seattle, WA · 98154

206-372-3162

Samantha C. Pak

Reg. 58839

Patent attorney

Physio-Control/Stryker

redmond, WA · 98052

425-867-4290

Common questions

Do I need a patent attorney based in Washington?

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 Washington-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 Washington?

1,446 active USPTO-registered patent practitioners list a Washington 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.