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 Christensen O'Connor Johnson Kindness PLLC, Lee & Hayes, PLLC, and Wilson Sonsini Goodrich & Rosati.

Top cities in Washington

All practitioners in Washington

Yahn Lin Chu

Reg. 75946

Patent attorney

Wilson Sonsini Goodrich & Rosati

Seattle, WA · 98104

206-883-2557

Crystal P. Chung

Reg. 84471

Patent agent

Seattle, WA · 98102

909-569-8607

Timothy J Churna

Reg. 48340

Patent agent

Microsoft Corporation

Redmond, WA · 98052-5393

425-421-6189

Michael R Cicero

Reg. 69337

Patent attorney

Olympus Corporation of the Americas

Redmond, WA · 98052

206-660-8613

Dominic P Ciminello

Reg. 54038

Patent agent

Lee & Hayes, PLLC

Spokane, WA · 99201

509-324-9256

Cory G Claassen

Reg. 50296

Patent attorney

Christensen O'Connor Johnson Kindness PLLC

Seattle, WA · 98101-3029

206-695-1756

Anthony B Claiborne

Reg. 39636

Patent attorney

Bellevue, WA · 98005

425-562-6290

Ian G. Clapp

Reg. 52750

Patent attorney

Auburn, WA · 98092

206-331-1892

Janet P Clark

Reg. 34799

Patent attorney

Auburn, WA · 98001

925-548-7705

Kristen M. Clark

Reg. 75438

Patent attorney

Battelle Memorial Institute at PNNL

Richland, WA · 99352

509-372-4042

Michael S Clarke

Reg. 60127

Patent agent

Mercer Island, WA · 98040

206-226-1910

Nicholas A. Clawson

Reg. 83424

Patent attorney

Christensen O'Connor Johnson Kindness PLLC

Seattle, WA · 98101

206-695-1703

Jonathan A Claypool

Reg. 52754

Patent attorney

Claypool Intellectual Property

Seattle, WA · 98109

206-588-0911

Kenneth W Clayton

Reg. 73693

Patent agent

Federal Way, WA · 98003

214-457-1383

Michael F. Cleary

Reg. 65677

Patent attorney

Vancouver, WA · 98661

360-433-8953

Thomas W. Cleary

Reg. 75408

Patent agent

Lee & Hayes, PLLC

Seattle, WA · 98101

206-876-6026

Peter A Clevenger

Reg. 66386

Patent attorney

Itron, Inc.

Liberty Lake, WA · 99019

509-891-3724

Todd J. Cloutier

Reg. 63520

Patent agent

Edmonds, WA · 98020

425-760-4653

Christopher John Clugston

Reg. 47213

Patent agent

Wenatchee, WA · 98801

509-664-8875

Mikayden T. Cmelo

Reg. 84380

Patent agent

Salkum, WA · 98582

360-219-5454

Justin E Coe

Reg. 67382

Patent attorney

Seed Intellectual Property Law Group LLP

Seattle, WA · 98104

206-622-4900

Hilde M L Coeckx

Reg. 57506

Patent attorney

Apex Juris, pllc

Edmonds, WA · 98020

206-664-0314

Makiko Coffland

Reg. 71363

Patent attorney

Christensen O'Connor Johnson Kindness PLLC

Seattle, WA · 98101

206-682-8100

David V.H. Cohen

Reg. 69621

Patent attorney

ÆON Law

Seattle, WA · 98102

206-217-2200

Heather M Colburn

Reg. 50815

Patent attorney

Davis Wright Tremaine LLP

Seattle, WA · 98104

206-757-8021

Tandi L Collisson

Reg. 59200

Patent attorney

Fred Hutchinson Cancer Research Center

Seattle, WA · 98109

206-667-2652

Yury M Colton

Reg. 55081

Patent attorney

RareCyte

Seattle, WA · 98121

206-949-1685

Benjamin Robert Comfort

Reg. 903259

Limited recognition

Seattle University School of Law

Seattle, WA · 98122-1090

253-691-8896

Vitaliana Conforti

Reg. 39639

Patent attorney

Impel NeuroPharma, Inc.

Bellevue, WA · 98006-7801

206-261-5637

David C Conlee

Reg. 66680

Patent attorney

Seed IP Law Group

Seattle, WA · 98104

206-622-4900

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.