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 Davis Wright Tremaine LLP, Fenwick & West LLP, and Christensen O'Connor Johnson Kindness, PLLC.

Top cities in Washington

All practitioners in Washington

Jeffrey E Danley

Reg. 57228

Patent attorney

Seed Intellectual Property Law Group

Seattle, WA · 98104

206-622-4900

Timothy A Danskin

Reg. 40981

Patent attorney

Davis Wright Tremaine LLP

Seattle, WA · 98104-1610

206-757-8379

Kaustuv M Das

Reg. 77143

Patent attorney

Intellectual Ventures

Bellevue, WA · 98005-4046

425-247-2431

Hugh Brian Davis

Reg. 33054

Patent attorney

Hewlett-Packard CO

Vancouver, WA · 98683

360-212-2624

Barry L Davison

Reg. 47309

Patent attorney

Davis Wright Tremaine LLP

Seattle, WA · 98101

206-757-8023

Ewa M. Davison

Reg. 74498

Patent attorney

Fenwick & West LLP

Seattle, WA · 98101

206-389-4564

James L Davison

Reg. 40334

Patent attorney

Business Consulting Services

Woodinville, WA · 98077

425-844-6422

Greggory T. Dawson

Reg. 76895

Patent attorney

Seattle, WA · 98125

206-484-8495

Dennis M de Guzman

Reg. 41702

Patent attorney

Medina, WA · 98039

425-505-0910

Willem J. De Van Der Schueren

Reg. 81625

Patent attorney

Seed Intellectual Property Law Group LLP

Seattle, WA · 98104

206-622-4900

Brian J Deagle

Reg. 43579

Patent attorney

Sammamish, WA · 98075

425-785-8623

Phillip K. Decker

Reg. 66312

Patent agent

Fenwick & West LLP

Seattle, WA · 98101

206-389-4534

Kathleen M Deeley

Reg. 41985

Patent attorney

Trubion Pharmaceuticals Inc.

Seattle, WA · 98121

206-838-0500

John D Denkenberger

Reg. 44060

Patent attorney

Christensen O'Connor Johnson Kindness, PLLC

Seattle, WA · 98101-3029

206-682-8100

Benjamin R. Desch

Reg. 81419

Patent attorney

Perkins Coie LLP

Seattle, WA · 98101

206-359-6112

Timothy F Dewberry

Reg. 62947

Patent attorney

Folio Law Group PLLC

Seattle, WA · 98109

206-880-1802

Joann K Dewey

Reg. 52769

Patent attorney

Microsoft Corporation

Redmond, WA · 98052

Roy P Diaz

Reg. 62175

Patent attorney

L'OREAL Research & Innovation

Redmond, WA · 98052-4952

425-285-1711

Michael J Didas

Reg. 55112

Patent attorney

Lee & Hayes, PLLC

Spokane, WA · 99201

509-324-9256

Daniel J. DiLorenzo

Reg. 54069

Patent agent

BioNeuronics Corporation

Seattle, WA · 98109

Phong T. Dinh

Reg. 67475

Patent attorney

Microsoft

Redmond, WA · 98052

126-940-86958

David A Divine

Reg. 51275

Patent attorney

Lee & Hayes, PLLC

Spokane, WA · 99201

509-324-9256

Robert D Divine

Reg. 84160

Patent agent

Seattle, WA · 98106

602-615-3989

Ryan E Dodge· Jr

Reg. 42492

Patent attorney

Christensen O'Connor Johnson Kindness, PLLC

Seattle, WA · 98101-3029

206-682-8100

Richard P Dodson

Reg. 52824

Patent agent

KILPATRICK TOWNSEND & STOCTON, LLP

Seattle, WA · 98101

206-224-2852

Stein E. Dolan

Reg. 72599

Patent agent

Microsoft Corp.

Redmond, WA · 98052

425-707-5191

Katharine Yao Domitrovich

Reg. 77712

Patent agent

Seattle, WA · 98104

206-332-1112

Thomas M Donahue· Jr

Reg. 43590

Patent attorney

Bellevue, WA · 98004

425-753-5995

Ryan P. Donoghue

Reg. 75526

Patent agent

Newport IP, LLC

Bellevue, WA · 98004

888-785-1482

Michael J Donohue

Reg. 35859

Patent attorney

Davis Wright Tremaine LLP

Seattle, WA · 98104-1610

206-757-8029

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.