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 AMPACC Law Group, PLLC, Gonzaga University School of Law, and Shook, Hardy & Bacon.

Top cities in Washington

All practitioners in Washington

Jinchul Hong

Reg. 77903

Patent attorney

AMPACC Law Group, PLLC

Lynnwood, WA · 98037

425-348-3500

Sunny K Hong

Reg. 58102

Patent attorney

Bellevue, WA · 98005

206-909-2473

Matthew Thomas Horn

Reg. 902404

Limited recognition

Gonzaga University School of Law

Spokane, WA · 99202

509-313-5791

Wesley A Horner

Reg. 71378

Patent attorney

Shook, Hardy & Bacon

Seattle, WA · 98104

206-344-7609

Dujuan A Horton

Reg. 80545

Patent agent

Lee & Hayes

Seattle, WA · 98101

757-752-0288

John D. Houvener

Reg. 72087

Patent attorney

Bold IP, LLC

Mountlake Terrace, WA · 98043

425-582-5670

Christiann P Howard

Reg. 59692

Patent agent

Christiann Howard

Seattle, WA · 98133

541-808-2309

Candice C Hsu

Reg. 66237

Patent attorney

Fortem IP LLP

Seattle, WA · 98101

408-503-6517

Chi-Feng Hsu

Reg. 74216

Patent agent

CKC & Partners Co., LLC.

Seattle, WA · 98125

888-388-6609

Yang Hsien Hsu

Reg. 76043

Patent attorney

Ashurst Perkins Coie

Seattle, WA · 98101

206-359-6881

Shen Huang

Reg. 71163

Patent agent

Bellevue, WA · 98004

425-214-3253

David J Huffaker

Reg. 56771

Patent attorney

Bellevue, WA · 98005

425-677-2810

Michael F Hughes

Reg. 41084

Patent attorney

Hughes Law Firm, PLLC

Bellingham, WA · 98226

360-647-1296

John C Hughs

Reg. 47236

Patent attorney

Northwest Patent Law

Richland, WA · 99352

509-545-3055

Colleen H. Hui

Reg. 83895

Patent attorney

Christensen O'Connor Johnson Kindness PLLC.

Seattle, WA · 98101

206-695-1770

Jeffrey E Hundley

Reg. 42676

Patent agent

Cooley LLP

Seattle, WA · 98101-1355

202-452-8800

Philip R. M. Hunt

Reg. 58044

Patent attorney

Washougal, WA · 98671

503-758-6292

Samantha N. Hunt

Reg. 79993

Patent attorney

Davis Wright Tremaine

Seattle, WA · 98104-1610

206-757-8563

David T Hunter

Reg. 40655

Patent attorney

Lane Powell Spears Lubersky LLP

Seattle, WA · 98101

206-223-7083

David M Huntley

Reg. 40309

Patent attorney

Loon Lake, WA · 99148

509-624-4091

Beth A Hutchens

Reg. 61695

Patent attorney

Renton, WA · 95055

480-310-2325

Daniel O. Hutchins

Reg. 73331

Patent agent

Christensen O'Connor Johnson Kindness PLLC

Seattle, WA · 98101-3029

206-695-1744

William Chao-Hui Hwang

Reg. 36169

Patent attorney

Microsoft Corporation

Redmond, WA · 98052

425-705-2386

Robert C Hyta

Reg. 46791

Patent attorney

Wells St. John, PS

Spokane, WA · 99201

509-624-4276

Robert Iannucci

Reg. 33514

Patent attorney

Seed Intellectual Property Law Group LLP

Seattle, WA · 98104

206-622-4900

Christopher T Igielski

Reg. 44794

Patent attorney

Seattle, WA · 98102

253-250-5400

Maki Imakura

Reg. 68118

Patent attorney

Shoreline, WA · 98177

206-465-8610

Blake A Impecoven

Reg. 77990

Patent agent

Lee & Hayes, PC

Spokane, WA · 99201

509-944-4679

Patrick J S Inouye

Reg. 40297

Patent attorney

Cascadia Intellectual Property

Lynnwood, WA · 98046

206-532-6690

Mika Ito

Reg. 71201

Patent attorney

Kilpatrick Townsend & Stockton LLP

Seattle, WA · 98101

206-626-7712

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.