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 Microsoft Corporation, Seed Intellectual Property Law Group LLP, and Fortem IP LLP.

Top cities in Washington

All practitioners in Washington

Christopher Leonard

Reg. 41940

Patent attorney

Lee & Hayes, PC

Spokane, WA · 99201

509-324-9256

Tatiana V Leshchinsky

Reg. 51938

Patent agent

Tatiana Leshchinsky

Bainbridge Island, WA · 98110

206-450-8281

Lisa Y. Leung

Reg. 73117

Patent attorney

Microsoft Corporation

Redmond, WA · 98052

703-889-0284

Paul William Leuzzi· II

Reg. 29556

Patent attorney

Weyerhaeuser Company

Seattle, WA · 98104

206-539-4362

Sean P Lewis

Reg. 42798

Patent attorney

Sean P. Lewis, Esq.

East Wenatchee, WA · 98802

208-505-7747

Shreya B. Ley

Reg. 75634

Patent attorney

Lay Roots

Seattle, WA · 98102

206-219-9559

Yiheng Li

Reg. 66397

Patent attorney

Seed Intellectual Property Law Group LLP

Seattle, WA · 98104

206-622-4900

You Li

Reg. 79501

Patent agent

FIG. 1 patents, PLLC

Spokane, WA · 99201-3669

509-755-7236

Yuandong Li

Reg. 84261

Patent agent

Bothell, WA · 98021

206-235-7884

Catherine O Liang

Reg. 61778

Patent attorney

Fortem IP LLP

Seattle, WA · 98101

408-901-0776

Chen Liang

Reg. 51945

Patent attorney

Liang IP, PLLC

Bellevue, WA · 98007

206-569-8198

Jeff Liao

Reg. 83482

Patent attorney

Stoel Rives

Seattle, WA · 98101

206-386-7531

Shan Liao

Reg. 76856

Patent attorney

Lee & Hayes

Seattle, WA · 98101

206-876-6012

Toby J Ligon

Reg. 74699

Patent attorney

Seed IP Law Group, LLP

Seattle, WA · 98104

206-622-4900

Alexis A Liistro

Reg. 68948

Patent attorney

Davis Wright Tremaine LLP

Seattle, WA · 98101-3045

206-757-8025

Susuk Lim

Reg. 70557

Patent attorney

Davis Wright Tremaine LLP

Seattle, WA · 98101

206-757-8047

Benjamin S Lin

Reg. 58858

Patent attorney

Microsoft Corporation

Redmond, WA · 98052

888-725-1047

Matthew C. Lin

Reg. 82427

Patent agent

Bellevue, WA · 98006

425-260-5147

Qing Lin

Reg. 53937

Patent attorney

Seed Intellectual Property Law Group LLP

Seattle, WA · 98104

206-622-4899

Matthew V Lincicum

Reg. 61319

Patent attorney

Fortem IP LLP

Seattle, WA · 98101

206-413-6646

Eric A Lindberg

Reg. 70808

Patent attorney

Seed Intellectual Property Law Group PLLC

Seattle, WA · 98104

206-622-4900

Lorraine Linford

Reg. 35939

Patent attorney

Cozen O'Connor

Seattle, WA · 98104

206-373-7269

Emily Hull Ling

Reg. 58619

Patent attorney

Spokane, WA · 99204

509-863-6250

Lisa G. Lippert

Reg. 78332

Patent agent

DLA Piper

Seattle, WA · 98104

858-638-6909

Jan Carol Little-Washington

Reg. 41181

Patent attorney

Law Office of Jan Little-Washington

Seattle, WA · 98118

206-489-7517

George D Liu

Reg. 47752

Patent attorney

Redmond, WA · 98053

425-836-1593

Jean I Liu

Reg. 38682

Patent attorney

Seattle Genetics

Bothell, WA · 98021

425-527-4882

Shi Liu

Reg. 67099

Patent attorney

Seed IP Law Group LLP

Seattle, WA · 98104

206-622-4900

Dennis P Lo

Reg. 72528

Patent agent

Vancouver, WA · 98663

360-356-4546

Karen Lo

Reg. 61352

Patent agent

Seattle, WA · 98112

206-354-1960

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.