California

Patent attorneys in California

California hosts 9,553 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 California. 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 Knobbe Martens Olson and Bear LLP, Konrad, Raynes, Davda & Victor LLP, and Karl Storz Imaging.

Top cities in California

All practitioners in California

David W Victor

Reg. 39867

Patent attorney

Konrad, Raynes, Davda & Victor LLP

Los Angeles, CA · 90064

310-553-7977

Gilbert J Villaflor

Reg. 56259

Patent agent

Lakewood, CA · 90712

510-910-2051

David N Villalpando

Reg. 62931

Patent agent

Karl Storz Imaging

Goleta, CA · 93117

805-968-5563

Josue A Villalta

Reg. 54511

Patent attorney

Knobbe Martens Olson and Bear LLP

Irvine, CA · 92614

949-760-0404

James S. Villanueva

Reg. 71353

Patent attorney

Handle Financial, Inc.

Sunnyvale, CA · 94089

415-562-7208

Joseph M Villeneuve

Reg. 37460

Patent attorney

Weaver Austin Villeneuve & Sampson, LLP

Oakland, CA · 94607

510-663-1100

Jennifer K. Villoria

Reg. 81312

Patent attorney

Irvine, CA · 92604

919-433-6095

Lester J Vincent

Reg. 31460

Patent attorney

Womble Bond Dickinson LLP

Palo Alto, CA · 94304

408-341-3000

Christopher R. Vinci

Reg. 79037

Patent agent

Singular Genomics

San Diego, CA · 92121-1102

323-309-9056

Alvin K Viray

Reg. 52324

Patent attorney

Law Offices Of Alvin K Viray

Irvine, CA · 92616

858-342-3543

Philip Thomas Virga

Reg. 36710

Patent attorney

Law Office of Philip T. Virga

Redondo Beach, CA · 90278

310-947-2547

Kyle A Mitchell Virgien

Reg. 74260

Patent attorney

Latham & Watkins LLP

SAN FRANCISCO, CA · 94111

415-395-8074

Ricardo I. Viscarra

Reg. 81357

Patent attorney

Los Angeles, CA · 90010

310-347-2680

Morgan E. Visoso

Reg. 83610

Patent attorney

Herbert Smith Freehills Kramer (US) LLP

Redwood City, CA · 94065

650-752-1750

Anand Viswanathan

Reg. 70948

Patent attorney

BioMarin Pharmaceutical, Inc.

Novato, CA · 94949

415-842-8585

Kelvin M Vivian

Reg. 53727

Patent attorney

Marvell Semiconductor, Inc.

Santa Clara, CA · 95054

408-222-2500

Garth Vivier

Reg. 57313

Patent attorney

Schwegman, Lundberg & Woessner, P.A.

San Jose, CA · 95113

408-278-4041

Jessica Vlies

Reg. 901464

Limited recognition

University of San Francisco School of Law

San Francisco, CA · 94117-1080

224-554-9406

Dang M Vo

Reg. 45183

Patent attorney

San Diego, CA · 92130

Dominick A Vo

Reg. 65415

Patent agent

Sunnyvale, CA · 94086

408-858-2912

Joseph A. Vo

Reg. 43971

Patent attorney

NVIDIA Corp.

Santa Clara, CA · 95050

408-486-2000

Toan P Vo

Reg. 43225

Patent attorney

ESCONDIDO, CA · 92026

518-878-3091

Tong B. Vo

Reg. 76464

Patent agent

Tong Vo

Rocklin, CA · 95677

669-234-8664

Eric K Voelk

Reg. 45185

Patent attorney

BioMarin Pharmaceutical Inc.

Novato, CA · 94949

415-506-6700

Joel D. Voelzke

Reg. 37957

Patent attorney

Intellectual Property Law Office of Joel Voelzke

Malibu, CA · 90265-3042

310-317-4466

Dusty S Vogelpohl

Reg. 55703

Patent attorney

Law Offices of Wayne Jones

Palo Alto, CA · 94303

650-424-8100

Neil K Vohra

Reg. 67159

Patent attorney

Broadcom Corporation LLP

Irvine, CA · 92617

949-926-4839

Jerry D Voight

Reg. 23020

Patent attorney

Los Altos, CA · 94022

650-949-2244

Jurgen Klaus Vollrath

Reg. 49098

Patent attorney

SAP Labs LLC

Palo Alto, CA · 94304

650-320-3530

Gerard Von Hoffmann

Reg. 33043

Patent attorney

Knobbe Martens Olson and Bear LLP

Irvine, CA · 92614

949-760-0404

Common questions

Do I need a patent attorney based in California?

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 California-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 California?

9,553 active USPTO-registered patent practitioners list a California 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.