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 Seed Intellectual Property Law Group LLP, CKC & Partners Co., LLC, and Microsoft Corporation.

Top cities in Washington

All practitioners in Washington

Ritwik Chatterjee

Reg. 75313

Patent agent

Lee & Hayes, PLLC

Spokane, WA · 99201

509-324-9256

Sangeeta K Cheema

Reg. 63400

Patent agent

Seed Intellectual Property Law Group LLP

Seattle, WA · 98104

206-694-4861

Andrew Y Chen

Reg. 74229

Patent attorney

Seattle, WA · 98144

425-753-5577

Candy K Chen

Reg. 57888

Patent agent

CKC & Partners Co., LLC

Seattle, WA · 98125

888-388-6609

Christine S Chen

Reg. 76565

Patent agent

Seed IP Law Group LLP

Seattle, WA · 98104

206-622-4900

David W C Chen

Reg. 51375

Patent attorney

Seattle, WA · 98114

206-779-5394

Elliott Y Chen

Reg. 58293

Patent attorney

T-Mobile USA, Inc.

Bellevue, WA · 98006

142-527-82020

Wei-Chen Nicholas Chen

Reg. 56665

Patent attorney

Microsoft Corporation

Redmond, WA · 98052

425-421-0915

Adrienne Y Cheng

Reg. 62458

Patent attorney

Mercer Island, WA · 98040

310-922-8088

Connie Cheng

Reg. 72940

Patent attorney

Fortem IP LLP

Seattle, WA · 98101

206-656-3180

Michael A Chernoff

Reg. 81284

Patent attorney

Seed Intellectual Property Law Group LLP

Seattle, WA · 98104

206-694-4825

Dominic A Chiarelli

Reg. 66840

Patent attorney

Zymeworks Biopharmaceuticals Inc.

Seattle, WA · 98161

206-237-1030

Timothy L Chien

Reg. 80692

Patent attorney

Seattle, WA · 98107

248-520-1636

Davina L Childs

Reg. 47485

Patent attorney

Vulcan, Inc.

Seattle, WA · 98104

206-342-2580

Davin K Chin

Reg. 58413

Patent attorney

Chin IP, PLLC

Bellevue, WA · 98008

425-633-2388

Patrick Chinkiwsky

Reg. 74801

Patent attorney

Patrick Chinkiwsky Law Office PLLC

Seattle, WA · 98133

425-224-7284

Chih Huai Chiu

Reg. 75299

Patent agent

CKC & Partners Co., LLC

Seattle, WA · 98125

888-388-6609

Justin Y. Cho

Reg. 81941

Patent attorney

Perkins Coie

Seattle, WA · 98101

206-359-3084

Michael Y. Cho

Reg. 39139

Patent attorney

Bankers Law Group, PLLC

Mukilteo, WA · 98275

425-220-2542

Steve Y Cho

Reg. 44612

Patent attorney

AMPACC Law Group

Lynnwood, WA · 98037

Daniel Choi

Reg. 66714

Patent attorney

Microsoft Corporation

Redmond, WA · 98502

425-704-9664

Tina L.Y. Choi

Reg. 78299

Patent agent

Dorsey and Whitney, LLP

Seattle, WA · 98104

206-903-8781

Szegien P Chow

Reg. 39524

Patent agent

Intellectual Ventures, LLC

Bellevue, WA · 98005

425-247-2417

Daniel R Christen

Reg. 39943

Patent attorney

Core Scientific

Bellevue, WA · 98004

425-894-7281

Dana L Christensen

Reg. 54035

Patent attorney

Mattawa, WA · 95113

202-452-0540

Isaac J Christensen

Reg. 84156

Patent agent

FIG. 1 Patents

Spokane, WA · 99201

360-888-3469

Peter C. Christensen

Reg. 61042

Patent attorney

Battelle / PNNL

Richland, WA · 99352

509-371-6159

Alex K Chu

Reg. 60549

Patent attorney

Athorus, PLLC

Mount Vernon, WA · 98273

360-386-1632

Dinh C P Chu

Reg. 41676

Patent attorney

Christensen O'Connor Johnson Kindness PLLC

Seattle, WA · 98101-3029

206-682-8100

Johnny B Chu

Reg. 68900

Patent agent

Bothell, WA · 98021

425-806-7472

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.