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 David R. Preston & Associates, APC, Law Office of Laurence H. Pretty, and RayzeBio.

Top cities in California

All practitioners in California

David R Preston

Reg. 38710

Patent attorney

David R. Preston & Associates, APC

San Diego, CA · 92126

858-724-0375 X 102

Laurence Herbert Pretty

Reg. 25312

Patent attorney

Law Office of Laurence H. Pretty

Pasadena, CA · 91106

626-304-9890

Gerald Ray Prettyman· Jr

Reg. 48778

Patent attorney

Pleasanton, CA · 94566

925-600-7342

Paul Michael Previde

Reg. 48286

Patent attorney

Corona Del Mar, CA · 92625

949-644-0074

Cathy Preville

Reg. 82963

Patent agent

RayzeBio

San Diego, CA · 92121

860-823-1877

Eric A Price

Reg. 53484

Patent agent

Secom Intrntl INC

Los Angeles, CA · 90045

310-641-1290

Joseph Washington Price· Jr

Reg. 25124

Patent attorney

Snell & Wilmer LLP

Costa Mesa, CA · 92626

714-427-7420

Leanne C Price

Reg. 42090

Patent attorney

FibroGen, Inc.

San Francisco, CA · 94158

415-978-1740

Lucinda Grace Price

Reg. 42270

Patent attorney

Penn Valley, CA · 95946

818-585-6922

Tomas A. Prieto

Reg. 60675

Patent agent

Fish & Associates, PC

Irvine, CA · 92614

630-715-9678

John T Prince

Reg. 43019

Patent attorney

Aguanga, CA · 92536

617-640-0870

Robert W Prince

Reg. 38583

Patent attorney

Think IP, P.C. dba Prince IP

Poway, CA · 92064

619-618-2245

Gabrielle V. Prindle

Reg. 80996

Patent agent

HG Law LLP

San Jose, CA · 95110

669-213-1074

Michael P Prisbylla

Reg. 58866

Patent agent

Pleasant Hill, CA · 94523

925-682-1407

Denise R Pritchard

Reg. 82310

Patent attorney

Semtech Corporation

San Jose, CA · 95131

408-748-4723

Lance M Pritikin

Reg. 59845

Patent attorney

Law Offices of Lance M. Pritikin

Los Angeles, CA · 90067

310-876-1771

Courtney M. Prochnow

Reg. 67639

Patent attorney

Perkins Coie, LLP

Los Angeles, CA · 90067

310-788-3284

Amy E. Proctor

Reg. 75228

Patent attorney

Irell & Manella, LLP

Los Angeles, CA · 90067

310-203-7961

Gregory C. Proctor

Reg. 73819

Patent agent

Kramer Levin Naftalis & Frankel LLP

Menlo Park, CA · 94025

321-684-8406

Katherine Proctor

Reg. 31468

Patent agent

Procopio, Cory, Hargreaves & Savitch, LLP

San Diego, CA · 92101

619-238-1900

Stephen D Prodnuk

Reg. 43020

Patent attorney

Pfizer Inc

San Diego, CA · 92121

858-622-3087

Eugene I Prokopenko

Reg. 66659

Patent attorney

San Diego, CA · 92129

510-847-0873

William Walker Propp

Reg. 33604

Patent attorney

West Hollywood, CA · 90046

310-820-9869

Mark Joseph Protsik

Reg. 31788

Patent agent

Law Offices Of Schneck & Schneck

San Jose, CA · 95109-0005

408-297-9733

Jonah Proujansky-Bell

Reg. 73772

Patent agent

Jonah Probell

Menlo Park, CA · 94025

781-608-5912

Eric Kern Proul

Reg. 45025

Patent attorney

Websense, Inc.

San Diego, CA · 92121

858-320-9396

David P Prueter

Reg. 75939

Patent attorney

Medtronic, Inc.

Santa Rosa, CA · 95403

330-206-0094

James R Prutow

Reg. 53490

Patent attorney

San Diego, CA · 92129

858-484-7869

Kate L. Prybylowski

Reg. 75229

Patent agent

McNeill PLLC

San Diego, CA · 92108

858-924-1776

Don Neil C. Pua

Reg. 67028

Patent attorney

Western Digital Technologies Inc.

Irvine, CA · 92612

949-672-6107

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.