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, Gilliam IP PLLC, and Pacific Northwest National Laboratory.

Top cities in Washington

All practitioners in Washington

Christopher G. Kennedy

Reg. 81317

Patent agent

Gilliam IP PLLC

Redmond, WA · 98052

425-864-6211

Mike O Kennedy

Reg. 48339

Patent attorney

Pacific Northwest National Laboratory

Richland, WA · 99352

509-554-9110

Brandon Nien Bao Kha

Reg. 902405

Limited recognition

Gonzaga University School of Law

Spokane, WA · 99202

509-313-5791

Eric N. Kierkegaard

Reg. 58047

Patent attorney

Seattle, WA · 98103

415-987-0056

Ashley Y. Kim

Reg. 84703

Patent agent

Clyde Hill, WA · 98004

425-647-8703

Cindy J. Kim

Reg. 83869

Patent agent

Agora Law Group, PLLC

Lynnwood, WA · 98037

425-420-2333

Hanna Kim

Reg. 67811

Patent attorney

Microsoft Corporation

Redmond, WA · 98052

425-705-6139

James Yong Kim

Reg. 75584

Patent attorney

AGORA Law, LLC

Bellevue, WA · 98007

425-420-0405

Loree J Kim

Reg. 53126

Patent attorney

Inspire Patent, PLLC

Lynnwood, WA · 98046

888-501-4332

Nicholas J Kim

Reg. 57344

Patent attorney

Microsoft Corporation

Redmond, WA · 98052

425-421-4612

Tae K Kim

Reg. 82617

Patent agent

Bellevue, WA · 98007

217-390-6089

Jane Kim-Szpajda

Reg. 69290

Patent attorney

Seattle Genetics, Inc.

Bothell, WA · 98021

425-527-2633

Gary Stanley Kindness

Reg. 22178

Patent attorney

Christensen O'Connor Johnson Kindness PLLC

Seattle, WA · 98101-3029

206-682-8100

Jasbir Singh Kindra

Reg. 41115

Patent attorney

University of Washington, UW Tech Transfer

Seattle, WA · 98105

206-543-3970

Jeffrey Joseph King

Reg. 38515

Patent attorney

Patent Networks Law Group PLLC

Kirkland, WA · 98033

425-576-4235

Joshua King

Reg. 35570

Patent attorney

King IP Law

Bellevue, WA · 98015

425-922-4290

Michael C King

Reg. 44832

Patent attorney

Zonar System, Inc

Seattle, WA · 98188

206-878-2459

Stephen Lowell King

Reg. 19180

Patent attorney

Olympia, WA · 98502

360-867-1379

Victor N King

Reg. 55963

Patent attorney

King IP PLLC

Bellevue, WA · 98006

206-427-5147

Charles Arthur Kingsford-Smith

Reg. 34642

Patent agent

Bellingham, WA · 98226

360-738-6959

Stacy Kinzer

Reg. 50602

Patent attorney

Redmond, WA · 98052

206-279-1382

Michael Kevin Kirschner

Reg. 34851

Patent attorney

Sammamish, WA · 98029

425-890-0180

Leonid Kisselev

Reg. 70440

Patent attorney

Cascadia Intellectual Property

Lynnwood, WA · 98046

206-532-6690

Jason M Kittredge

Reg. 65723

Patent attorney

Spokane, WA · 99224

253-202-1077

Melanie K. Kitzan

Reg. 57397

Patent attorney

Alpine Immune Sciences, Inc

Seattle, WA · 98102

206-788-4545

Karl L Klassen

Reg. 54224

Patent attorney

Perkins Coie LLP

Seattle, WA · 98101

206-359-8000

William R A Kleysteuber· IV

Reg. 77883

Patent attorney

The Boeing Company

Seattle, WA · 98124-2207

425-306-7650

Paul A Knight

Reg. 53144

Patent agent

KnuBox Technologies

Spokane, WA · 99223

509-999-5912

Peter J Knudsen

Reg. 40682

Patent attorney

Baker Hostetler

Seattle, WA · 98104

206-332-1390

Jonathan A Ko

Reg. 65259

Patent attorney

Seattle, WA · 98105

630-624-6050

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.