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, FIG. 1 Patents, PLLC, and Patent JeM.

Top cities in Washington

All practitioners in Washington

Y. JeanMarie Z. Calvillo

Reg. 70001

Patent agent

Patent JeM

Gig Harbor, WA · 98335

197-153-30193

John Campa

Reg. 49014

Patent attorney

F5, Inc.

Seattle, WA · 98104

206-321-4072

Tyler C. Cantrell

Reg. 71362

Patent attorney

Davis Wright Tremaine LLP

Seattle, WA · 98119-3045

206-757-8028

Michelle E Carey

Reg. 72800

Patent attorney

Puget Patent, P.S.

Renton, WA · 98056-0047

425-293-1259

David Vernon Carlson

Reg. 31153

Patent attorney

Seed Intellectual Property Law Group LLP

Seattle, WA · 98104-7092

206-622-4900

Robert J Carlson

Reg. 35472

Patent attorney

Lee & Hayes, PLLC

Seattle, WA · 98101

206-876-6029

Timothy M Carlson

Reg. 38095

Patent attorney

Microsoft Corporation

Redmond, WA · 98052

425-703-1203

John R Carpenter

Reg. 38096

Patent attorney

Seattle, WA · 98118

206-293-4808

Amanda E Carter

Reg. 55039

Patent agent

Bainbridge Island, WA · 98110

858-220-0683

James J Carter

Reg. 56043

Patent attorney

Office of James J. Carter

Seattle, WA · 98125

206-660-7773

Timothy D Casey

Reg. 33124

Patent attorney

Baker & Hostetler LLP

Seattle, WA · 98104-4040

206-332-1107

Benjamin D Cashdollar

Reg. 78901

Patent attorney

Perkins Coie LLP

Seattle, WA · 98101

206-359-8000

Traci Cassan

Reg. 61083

Patent attorney

Dollar Development

Mercer Island, WA · 98040

206-232-1980

Angelo J Castellino

Reg. 52707

Patent agent

Angelo Castellino-Sole Proprietor

Stanwood, WA · 98292

360-652-9684

Gerardo M Castillo

Reg. 57156

Patent agent

Bothell, WA · 98021

206-234-7970

Charles D Cathey

Reg. 63587

Patent attorney

Law Office of Charles Cathey, PLLC

Eastsound, WA · 98245

415-367-5095

Nathan K Cernetic

Reg. 75741

Patent agent

Christensen O'Connor Johnson Kindness PLLC

Seattle, WA · 98101

206-682-8100

Michael C Cerrone

Reg. 39132

Patent agent

BiotechInk LLC

Mercer Island, WA · 94404

650-281-6198

Joseph Ollie Chalverus

Reg. 30144

Patent attorney

Law Office Of Joseph Chalverus

Seattle, WA · 98125-1950

206-361-4840

Donna M Chamberlin

Reg. 52712

Patent attorney

Lewis Brisbois Bisgaard & Smith LLP

Seattle, WA · 98101

206-436-2020

Alistair K Chan

Reg. 44603

Patent attorney

Alistair Chan IP LLC

Bainbridge Island, WA · 98110

414-699-3619

Frieda K. Chan

Reg. 77101

Patent agent

Cooley LLP

Seattle, WA · 98101

408-250-9289

Hark C Chan

Reg. 35477

Patent attorney

Bellevue, WA · 98007

425-279-0198

Lily Yee-Nga Chan

Reg. 68699

Patent attorney

Seattle, WA · 98104

206-335-5799

Asmita V Chande

Reg. 72064

Patent agent

The Boeing Company

Seattle, WA · 98108

206-544-2931

Jack Chang

Reg. 65303

Patent attorney

Davis Wright Tremaine LLP

Seattle, WA · 98104

206-757-8300

Jerome D Chang

Reg. 77461

Patent attorney

Davis Wright & Tremaine LLP

Seattle, WA · 98104

213-665-9610

Scott A Chapple

Reg. 46287

Patent attorney

FIG. 1 Patents, PLLC

Spokane, WA · 99201-3669

817-551-8793

Marcellus A. Chase

Reg. 56664

Patent attorney

Randall Danskin P.S.

Spokane, WA · 99201

509-747-2052

Charles Chasney· IV

Reg. 71434

Patent attorney

FIG. 1 Patents, PLLC

Spokane, WA · 99201-3669

509-321-0748

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.