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 Microsoft Corporation, Lee & Hayes, PC, and Athorus, PLLC.

Top cities in Washington

All practitioners in Washington

Rachel Amarette Haller

Reg. 71793

Patent attorney

Microsoft Corporation

Redmond, WA · 98052

425-727-0232

Eric G Halsne

Reg. 46753

Patent agent

Halsne Law Group, PLLC

Kenmore, WA · 98028

425-408-0416

Kevin R Halverson

Reg. 62000

Patent attorney

Blackacre Law PLLC

Seattle, WA · 98136

206-574-8005

James P Hamley

Reg. 28081

Patent attorney

James P. Hamley

Mill Creek, WA · 98012

425-337-2763

John C Hammar

Reg. 29928

Patent attorney

Edmonds, WA · 98026-5332

425-879-6177

Erika M. Hammer

Reg. 81719

Patent attorney

Lee & Hayes, PC

Spokane, WA · 99201

509-944-4648

Andy M. Han

Reg. 60266

Patent attorney

Han IP PLLC

Kirkland, WA · 98033

206-627-0355

Benjamin Y Han

Reg. 60700

Patent attorney

Athorus, PLLC

Mount Vernon, WA · 98273

206-430-5110

Hai Han

Reg. 54150

Patent attorney

Seed Intellectual Property Law Group PLLC

Seattle, WA · 98104

206-622-4900

Jongtae Mark Han

Reg. 57898

Patent attorney

Intuitive IP

Newcastle, WA · 98059

425-999-0350

Zhihua Han

Reg. 71759

Patent attorney

Mercer Island, WA · 98040

206-973-6936

Jacob V Handy

Reg. 48347

Patent attorney

Fenwick & West LLP

seattle, WA · 98101

415-875-2449

Michael R Hansen

Reg. 52431

Patent agent

Weyerhaeuser CO

Federal Way, WA · 98063

253-924-6345

Paul S. Hanson

Reg. 72818

Patent agent

Invent Northwest, LLC

Kirkland, WA · 98034-5741

206-399-4259

Tejpal Singh Hansra

Reg. 38172

Patent attorney

Hansra Intellectual Property Law

Renton, WA · 98059

360-527-1400

Bruce E Harang

Reg. 29720

Patent attorney

BHPATENT

Vancouver, WA · 98687

360-903-4693

Reda Harb

Reg. 74537

Patent agent

Issaquah, WA · 98027

425-213-0317

Tanya M Harding

Reg. 42630

Patent attorney

Lee & Hayes, PC

Seattle, WA · 98101

503-317-4728

William J Harmon· III

Reg. 40635

Patent attorney

Shook, Hardy & Bacon

Seattle, WA · 98104

206-344-7601

Derek L. Harris

Reg. 60395

Patent attorney

Microsoft Corporation

Redmond, WA · 98052-6399

425-704-7399

Larry T Harris

Reg. 44745

Patent attorney

Athorus, PLLC

Seattle, WA · 98111

206-430-5110

Robert G. Hartman

Reg. 58970

Patent attorney

Lee & Hayes, PLLC

Spokane, WA · 99201

509-324-9256

Eric A. Harwood

Reg. 59937

Patent attorney

Seed Intellectual Property Law Group LLP

Seattle, WA · 98104

206-622-4900

Melissa M. Harwood

Reg. 60229

Patent attorney

Kilpatrick Townsend & Stockton LLP

Seattle, WA · 98101

206-626-7783

Martin D Hash

Reg. 59431

Patent agent

Hash Enterprises, Inc.

Vancouver, WA · 98660

360-750-0042

Brian Dean Haslam

Reg. 56372

Patent attorney

Lenovo (U.S.)

Bellevue, WA · 98072

425-894-1426

Todd Nelson Hathaway

Reg. 32991

Patent attorney

Attorney at Law

Bellingham, WA · 98225

360-647-1976

James L T Haugen

Reg. 60056

Patent attorney

Seattle Patent Group LLC

Redmond, WA · 98052

425-202-7969

Scott R Hayden

Reg. 41821

Patent attorney

Amazon.com

Seattle, WA · 98109-5210

206-266-7557

Daniel Leo Hayes

Reg. 34618

Patent attorney

Spokane, WA · 99223

509-230-2425

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.