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 Shimokaji & Associates, P.C., Sonnenschein Nath & Rosenthal LLP, and Wilson Sonsini Goodrich & Rosati.

Top cities in California

All practitioners in California

Michael Alan Shimokaji

Reg. 32303

Patent attorney

Shimokaji & Associates, P.C.

Irvine, CA · 92618

949-788-9968

Eugene S. Shin

Reg. 77953

Patent attorney

Bakersfield, CA · 93309

949-910-8921

Jimmy M Shin

Reg. 45103

Patent attorney

Sonnenschein Nath & Rosenthal LLP

Palo Alto, CA · 94304-1125

650-798-0388

Kathy L Shin

Reg. 53588

Patent attorney

Pleasanton, CA · 94588

Minyoung Shin

Reg. 72290

Patent attorney

Wilson Sonsini Goodrich & Rosati

San Diego, CA · 92130

858-350-2378

Richard T. Shin

Reg. 79825

Patent attorney

Enovix Corporation

Fremont, CA · 94538

510-695-2350

Tae Bum Shin

Reg. 62975

Patent attorney

Denali Therapeutics

South San Francisco, CA · 94080

650-677-3903

Vivian Suehae Shin

Reg. 43919

Patent attorney

Pasadena, CA · 91107

818-620-7565

Erika Shin-Kashiyama

Reg. 69163

Patent attorney

Pleasant Hill, CA · 94523

925-947-3905

Kaelyn A. Shinbashi

Reg. 82598

Patent attorney

San Francisco, CA · 94105

415-227-3695

Carolin Kay Shining

Reg. 35098

Patent attorney

Shining Law Firm

Sherman Oaks, CA · 91403

310-490-4383

Lindsay G Shinn

Reg. 54691

Patent agent

Mullen & Henzell, LLP

Santa Barbara, CA · 93101

805-966-1501

Craig Edward Shinners

Reg. 33281

Patent attorney

Synosys, Inc.

Mountain View, CA · 94043-4033

650-584-2818

Arash Shirdel

Reg. 64232

Patent attorney

Yorba Linda, CA · 92886

714-865-3513

Nadya Shirokova

Reg. 69453

Patent agent

Kramer Levin Naftalis & Frankel LLP

Redwood Shores, CA · 94065

650-752-1700

Fariba Shoarinejad

Reg. 48182

Patent attorney

Pfizer

San Diego, CA · 92121

858-622-5940

Jennifer L. Shockro

Reg. 75773

Patent agent

California Institute of Technology

Pasadena, CA · 91125

626-395-2322

Igor Shoiket

Reg. 43119

Patent attorney

Dergosits & Noah LLP

San Francisco, CA · 94111

415-705-6377

Charles Karel Sholtz

Reg. 38615

Patent attorney

Coherus Biosciences

Redwood City, CA · 94065

650-649-3537

Charles M Shonkwiler

Reg. 64868

Patent attorney

Danville, CA · 94526

206-799-3022

Richard D Shoop

Reg. 45763

Patent attorney

Shay Glenn LLP

San Mateo, CA · 94403

650-287-2164

Robert M Shore

Reg. 55619

Patent attorney

Motley Rice, LLC

Los Angeles, CA · 90067-2333

310-552-8127

Brian R Short

Reg. 41309

Patent attorney

Law Office Of Brian Short

Santa Clara, CA · 95051

408-888-9830

Carolyn A Short

Reg. 47550

Patent agent

Capia IP LLC

Del Mar, CA · 92014

858-699-1615

James Joseph Short

Reg. 25922

Patent attorney

La Canada, CA · 91011

818-952-2017

Rebecca Shortle

Reg. 47083

Patent attorney

Frontier Medicines Corporation

South San Francisco, CA · 94080

650-457-1005

Matthew D Show

Reg. 66435

Patent attorney

International Flavors & Fragrances Inc.

Palo Alto, CA · 94304

650-846-7503

Rachel L. Shpringer

Reg. 79207

Patent agent

Los Angeles, CA · 90024

213-300-5137

Jay Shrestha

Reg. 77999

Patent agent

Los Angeles, CA · 90034

773-226-7613

Cindy S. Shu

Reg. 67703

Patent attorney

South San Francisco, CA · 94080

650-467-0109

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.