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 Perkins Coie LLP, Microsoft Corporation, and COJK.

Top cities in Washington

All practitioners in Washington

David C. Andrews

Reg. 58641

Patent agent

Microsoft Corporation

Redmond, WA · 98052

425-703-5019

Michael J Antinore

Reg. 51409

Patent agent

Seattle, WA · 98119

206-352-6660

Margie B. Aoki

Reg. 62644

Patent attorney

COJK

Seattle, WA · 98101

253-861-3668

Mitchell Apper

Reg. 76997

Patent agent

Davis Wright Tremaine, LLP

Seattle, WA · 98104-1610

206-757-8197

Mario A Apreotesi

Reg. 65293

Patent attorney

FIG. 1 Patents, PLLC

Spokane, WA · 99201-3669

509-321-6425

Alberto Araiza

Reg. 60621

Patent attorney

Perkins Coie LLP

Seattle, WA · 98111-1247

650-838-4300

Joel B Ard

Reg. 67041

Patent attorney

Ard Law Group PLLC

Bainbridge Island, WA · 98110

206-701-9243

Ataullah Arjomand

Reg. 60497

Patent attorney

Arjomand Law Group

Issaquah, WA · 98027

425-445-4500

Raymond W Armentrout

Reg. 45866

Patent attorney

Black Lowe & Graham PLLC

Seattle, WA · 98104

206-957-2162

Loren G Armstrong

Reg. 51413

Patent attorney

Sound Transit

Seattle, WA · 98104

206-398-5212

Stephen E Arnett

Reg. 47392

Patent attorney

Perkins Coie LLP

Seattle, WA · 98101

206-264-6351

Esmeralda Arreguin-Martinez

Reg. 80355

Patent agent

Kirkland, WA · 98034

505-227-6068

William T. Arthur

Reg. 58814

Patent agent

Bridge Island, WA · 98110

206-491-4906

Brook Assefa

Reg. 61375

Patent attorney

Seattle, WA · 98108

425-442-8403

Marcus Assefa

Reg. 72190

Patent attorney

Perkins Coie LLP

Seattle, WA · 98111-1208

650-838-4498

Kim W Atherton

Reg. 48703

Patent agent

Micro Encoder INC

Kirkland, WA · 98034

425-821-3906

Ruth E Atherton

Reg. 56654

Patent attorney

Bill & Melinda Gates Foundation

Seattle, WA · 98102

206-770-1880

Ahmed D. Atik

Reg. 78342

Patent attorney

Atik Law PLLC

SEATTLE, WA · 98121

206-750-9700

Mary Atkinson

Reg. 48767

Patent attorney

K&L Gates

Seattle, WA · 98104-1158

206-370-7653

Alan P Au

Reg. 53958

Patent agent

Mercer Island, WA · 98040

206-291-0670

Max Samuel Aubain

Reg. 77295

Patent agent

PMB 7811A

Olympia, WA · 98507

845-594-5590

Andrew K. Aubert

Reg. 74433

Patent attorney

Blue Origin LLC

Kent, WA · 98032

253-437-9300

Robert Phillip Auerbach

Reg. 46525

Patent attorney

Carnelian Law LLC

Mill Creek, WA · 98012

425-243-3757

Scott L Ausenhus

Reg. 42271

Patent attorney

Seattle Genetics, Inc.

Bothell, WA · 98021

425-527-2805

I-Wei Eva Aw

Reg. 64432

Patent agent

Dendreon Corp.

Seattle, WA · 98121

206-829-1536

Anthony H Azure

Reg. 52580

Patent attorney

Microsoft Corporation

Redmond, WA · 98052

800-642-7676

Mark A Bailey

Reg. 76964

Patent attorney

AbCellera Biologics Inc

Seattle, WA · 98125

412-719-4142

Jonathan B. Bair

Reg. 78016

Patent attorney

Shoreline, WA · 98133

023-833-368

Vicky K Bajwa

Reg. 69709

Patent attorney

True Fabrications, Inc.

Seattle, WA · 98103

509-438-6168

Theodore W Baker

Reg. 53961

Patent attorney

Perkins Cole LLP

Seattle, WA · 98101

206-264-6351

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.