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 Jones Day, Knobbe Martens Olson & Bear, LLP, and Waymo LLC.

Top cities in California

All practitioners in California

Chhaya B. Bhakta

Reg. 62360

Patent agent

Santa Ana, CA · 92707

510-432-6248

Varun Bhardwaj

Reg. 64880

Patent agent

Hawthorne, CA · 90250

310-643-8793

Vikas Bhargava

Reg. 68005

Patent attorney

Knobbe Martens Olson & Bear, LLP

Irvine, CA · 92614

949-760-0404

Cyrus F Bharucha

Reg. 42324

Patent attorney

San Diego, CA · 92129

512-666-8847

Punita Bhasin

Reg. 67583

Patent attorney

Pittsburg, CA · 94565

812-629-4272

Sachin M. Bhatmuley

Reg. 79258

Patent attorney

Jones Day

San Diego, CA · 92121

858-395-9628

Rabin Bhattacharya

Reg. 70520

Patent attorney

Waymo LLC

Mountain View, CA · 94043

202-906-9070

Sumit Bhattacharya

Reg. 51469

Patent agent

Santa Clara, CA · 95050

Suvashis Bhattacharya

Reg. 46554

Patent attorney

LeClairRyan

San Francisco, CA · 94104

415-913-4909

Arpita Bhattacharyya

Reg. 63681

Patent agent

Perkins Coie

Palo Alto, CA · 94304

650-838-4575

Samik Bhattacharyya

Reg. 65425

Patent attorney

San Francisco, CA · 94133

706-372-1243

Megha Bhumralkar

Reg. 44536

Patent agent

Jones Day

Los Angeles, CA · 90071

213-243-2737

Shailendra C Bhumralkar

Reg. 38381

Patent attorney

Prosus Group

Los Altos, CA · 94022

650-559-5967

Vinay Bhupathy

Reg. 68037

Patent agent

Sheppard, Mullin, Richter & Hampton LLP

Los Angeles, CA · 90067

310-228-3735

Archana B Bhuta

Reg. 45182

Patent attorney

Clorox

Oakland, CA · 94612

650-341-8502

Jiang Bian

Reg. 800119

Limited recognition

Goodwin Procter LLP

Redwood City, CA · 94063

212-813-8836

Faith S Bianchi

Reg. 66227

Patent agent

San Diego, CA · 92110

619-270-6536

Gina A Bibby

Reg. 57407

Patent attorney

Withers Bergman LLP

Los Angeles, CA · 90067

310-277-9930

Julian G Bieber-Dishart

Reg. 82926

Patent agent

Wilson Sonsini Goodrich & Rosati

San Francisco, CA · 94105

415-947-2000

Traci A Biedermann

Reg. 71791

Patent attorney

Dana Point, CA · 92629

714-928-2601

Theodore J Bielen· Jr

Reg. 27420

Patent attorney

Bielen, Lampe & Thoeming

Concord, CA · 94520

925-288-9720

Hugo J. Biermann

Reg. 84745

Patent attorney

Schwegman Lundberg & Woessner, P.A.

San Jose, CA · 95128

408-660-2008

Stephen C. Biggs

Reg. 66097

Patent agent

San Diego, CA · 92192

408-387-9503

Michelle Biglarian

Reg. 72987

Patent attorney

La Crescenta, CA · 91214

818-421-5665

Luisa Bigornia

Reg. 45974

Patent attorney

BioMarin Pharmaceutical, Inc.

Novato, CA · 94949

415-506-6700

Janis Biksa

Reg. 33648

Patent attorney

Santa Rosa, CA · 95405

650-888-6140

Natalie A. Bilci

Reg. 75097

Patent agent

Neurocrine Biosciences, lnc.

San Diego, CA · 91230

858-239-6841

Ahmed Imtiaz Billah

Reg. 75577

Patent agent

MDE Patents

Encinitas, CA · 92024

732-887-7420

Nathan A Billings

Reg. 70600

Patent agent

Creyon Bio, Inc.

San Diego, CA · 92121

617-299-9318

Michael F Bilotta

Reg. 53991

Patent agent

SoCal Engineering, Inc.

San Marcos, CA · 92069

858-442-7303

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.