California

Patent attorneys in California

California hosts 9,567 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, Morrison & Foerster LLP, and Qualcomm, Inc..

Top cities in California

All practitioners in California

Sasan K. Behnood

Reg. 67964

Patent attorney

Tustin, CA · 92780

949-887-3700

Sayed H Beladi

Reg. 42311

Patent attorney

Qualcomm, Inc.

San Diego, CA · 92121

858-651-4470

David A Belasco

Reg. 41609

Patent attorney

Belasco Jacobs &Townsley, LLP

Los Angeles, CA · 90045

310-743-1188

Bridget P. Belcher

Reg. 82861

Patent agent

Desmarais LLP

San Francisco, CA · 94111

415-490-2554

Carmencita Marina Belei

Reg. 65298

Patent agent

Fullerton, CA · 92835

714-812-9768

Anna J. Belk

Reg. 59249

Patent agent

Beverly Hills, CA · 90210-3916

310-739-8102

Adam W Bell

Reg. 43490

Patent attorney

Bell & Associates

San Francisco, CA · 94127

415-752-4085

Barrie D Bell

Reg. 46740

Patent agent

Menlo Park, CA · 94025

650-208-5201

David L Bell

Reg. 45444

Patent attorney

Redondo Beach, CA · 40278

310-371-4573

H. Clark Bell

Reg. 40908

Patent agent

H F Plus

Chatsworth, CA · 91311

818-882-7811

Jay B Bell

Reg. 58551

Patent attorney

San Diego, CA · 92131

858-220-0190

Laurence D Bell

Reg. 52607

Patent agent

Fresh Food Sltns LLC

Pacific Grove, CA · 93950

831-642-9951

Michael L Bell

Reg. 58288

Patent agent

Fullerton, CA · 92835

714-488-7119

Scott G Bell

Reg. 66534

Patent attorney

Naval Postgraduate School

Monterey, CA · 93943

831-656-7537

Vanessa M Bell

Reg. 70333

Patent attorney

Kilpatrick Townsend & Stockton LLP

Walnut Creek, CA · 94596

925-472-5008

Matthew S Bellinger

Reg. 46547

Patent attorney

Knobbe Martens Olson and Bear, LLP

Irvine, CA · 92614

949-760-0404

Gregory R. Bellomy

Reg. 48451

Patent attorney

Bristol-Myers Squibb Company

Redwood City, CA · 94063

650-260-9187

Caroline D. Belt

Reg. 77761

Patent agent

Thermo Fisher Scientific

Carlsbad, CA · 92008

619-957-2634

Vincent J Belusko

Reg. 30820

Patent attorney

Morrison & Foerster LLP

Los Angeles, CA · 90017

213-892-5200

Ester Ben Noon Levy

Reg. 78738

Patent agent

Sunnyvale, CA · 94087

669-215-9317

David Heskel Ben-Meir

Reg. 46152

Patent attorney

Ben-Meir Law Group

Los Angeles, CA · 91403

818-903-0007

Meriel L Bench

Reg. 82705

Patent agent

San Diego, CA · 92192

628-400-6374

Ina K Bendis

Reg. 58359

Patent attorney

Santa Clara, CA · 95051

408-248-0248

Claire Leah Bendix

Reg. 76842

Patent agent

Morrison & Foerster LLP

San Francisco, CA · 94105

415-268-6130

Kevin D Bendix

Reg. 67164

Patent attorney

Kirkland & Ellis LLP

Los Angeles, CA · 90071

213-680-8400

John A Bendrick

Reg. 41612

Patent attorney

Brisbane, CA · 94005

415-466-2200

Mark R Benedict

Reg. 44531

Patent attorney

Knobbe Martens Olson and Bear, LLP

Irvine, CA · 92614

949-760-0404

Patrick D Benedicto

Reg. 40909

Patent attorney

Beyer Law Group LLP

Palo Alto, CA · 94303

650-842-1300

Steven J Benerofe

Reg. 41613

Patent attorney

San Francisco, CA · 94147-5375

William Patrick Bengtsson

Reg. 32456

Patent attorney

Moraga, CA · 94556

415-754-8439

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?

9,567 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.