Washington

Patent attorneys in Washington

Washington hosts 1,434 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 K & L Gates LLP, Rainier Patents, and Lee & Hayes, PLLC.

Top cities in Washington

All practitioners in Washington

Nicola J Templeton

Reg. 65983

Patent attorney

K & L Gates LLP

Seattle, WA · 98104

206-623-7580

Johann F. Thaheld

Reg. 79183

Patent attorney

Bellingham, WA · 98227-0366

360-922-7465

Joan Thomas

Reg. 49094

Patent attorney

Bellevue, WA · 98008

425-761-4221

Michael J Thomas

Reg. 80716

Patent attorney

BELLEVUE, WA · 98004

503-550-9710

Steven D Thomas· Jr.

Reg. 64421

Patent attorney

Rainier Patents

Spokane, WA · 99201

509-252-5015

David S Thompson

Reg. 37954

Patent attorney

Lee & Hayes, PLLC

Spokane, WA · 99201

509-944-4735

Loren Keith Thompson

Reg. 45918

Patent attorney

Spokane, WA · 99207

312-806-2623

Mary C Thomson

Reg. 43190

Patent attorney

Thomson Law, LLC.

Bellingham, WA · 98225

360-527-5228

Alexander C. Thoreen

Reg. 68889

Patent attorney

Camano Island, WA · 98282

602-639-1279

Tyler J. Thorp

Reg. 59124

Patent attorney

Newport IP, LLC

Bellevue, WA · 98004

888-785-1482

Corbyn J. Thorsen

Reg. 68134

Patent attorney

Space Exploration Technologies Corp.

Redmond, WA · 98053

310-363-6000

Frank F Tian

Reg. 46462

Patent agent

Tian & Associates

Federal Way, WA · 98023

646-283-6091

Le Tian

Reg. 66221

Patent attorney

Tian IP & Technology, LLC.

Bellevue, WA · 98007

425-223-4099

John G Tolomei

Reg. 57846

Patent attorney

Sonos, Inc.

Seattle, WA · 98122

206-370-1037

Lisa Tom

Reg. 52291

Patent attorney

LWIP Law

Newcastle, WA · 98059

425-533-0298

Lori K Tonnes-Priddy

Reg. 67369

Patent attorney

Everett, WA · 98208

206-818-8295

Matthew R Townsend

Reg. 64871

Patent agent

Spokane, WA · 99203

509-467-5381

Peter Trahms-Neudorfer

Reg. 59282

Patent attorney

Baker & Hostetler LLP

Seattle, WA · 98104

206-332-1380

Michael L Traino

Reg. 37249

Patent attorney

Sammamish, WA · 98075

142-549-59043

Catherine Hong Tran

Reg. 43960

Patent attorney

Perkins Coie, LLP

Seattle, WA · 98101

206-583-8888

Alexander M. Tranquill

Reg. 84818

Patent agent

Seattle, WA · 98115

503-840-0961

Rajdeep Trilokekar

Reg. 84358

Patent attorney

Lee & Hayes PC

Seattle, WA · 98104

206-694-4857

E-Ting Tsai

Reg. 81736

Patent agent

Seattle, WA · 98105

206-688-9633

Michael I Tsai

Reg. 62780

Patent attorney

Bellevue, WA · 98015

425-229-9777

Ching T Tsao

Reg. 75941

Patent agent

Edmonds, WA · 98026

206-306-0613

Nicos L Tsilas

Reg. 43206

Patent attorney

Microsoft Corporation

Redmond, WA · 98052

425-705-8476

Allan C Tuan

Reg. 55689

Patent agent

Battelle Memorial Institute

Richland, WA · 99352

509-375-6866

Rodney C Tullett

Reg. 34034

Patent attorney

Battle Ground, WA · 98604

206-369-1576

Marcia A. Tunheim

Reg. 42189

Patent attorney

Law Office of Marcia A. Tunheim, PLLC

Olympia, WA · 98508-3443

360-464-4087

Ashlin H. Turner

Reg. 83026

Patent agent

Perkins Coie

Seattle, WA · 98101-3099

206-359-8123

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?

1,434 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.