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 Erik T. Anderson, Esq., Wilson Sonsini Goodrich & Rosati, and Fulwider Patton LLP.

Top cities in California

All practitioners in California

Erik Thomas Anderson

Reg. 52559

Patent attorney

Erik T. Anderson, Esq.

San Diego, CA · 92112-4581

619-944-6822

Garrett H. Anderson

Reg. 73261

Patent attorney

Wilson Sonsini Goodrich & Rosati

Palo Alto, CA · 94304

650-493-9300

Gary M Anderson

Reg. 30729

Patent attorney

Fulwider Patton LLP

Los Angeles, CA · 90045

310-824-5555

Harvey J Anderson· II

Reg. 38812

Patent attorney

AVG Technologies

San Francisco, CA · 94107

415-595-6968

J. Eric Anderson

Reg. 58706

Patent attorney

Department of the Navy

San Diego, CA · 92152-5765

619-553-3001

Jason T. Anderson

Reg. 66094

Patent attorney

Howrey LLP

East Palo Alto, CA · 94303

650-798-3500

Jeffrey P. Anderson

Reg. 73507

Patent agent

Aptezzo Technology

Carlsbad, CA · 92009

760-712-3377

Lester J. Anderson

Reg. 45833

Patent attorney

Arent Fox LLP

Los Angeles, CA · 90013

213-629-7400

Michael Harrison Anderson

Reg. 73918

Patent attorney

Los Angeles, CA · 90016

714-225-4574

Michael D Anderson

Reg. 66839

Patent attorney

indie Semiconductor

Aliso Viejo, CA · 92656

949-806-4593

Osten P Anderson

Reg. 77796

Patent agent

Riverside, CA · 92516-0814

951-966-7011

Ronald Lee Anderson

Reg. 51404

Patent agent

Mountain View, CA · 94040

650-964-6351

William B Anderson

Reg. 41585

Patent attorney

Grant Anderson LLP

Carlsbad, CA · 92010

858-623-3227

H. Thomas Anderton· Jr.

Reg. 40895

Patent attorney

K&L Gates

San Francisco, CA · 94111

650-353-0615

Masako Ando

Reg. 59900

Patent attorney

Beyer Law Group LLP

Palo Alto, CA · 94303

650-842-1300

Armand Andonian

Reg. 83931

Patent attorney

Carlsbad, CA · 92011-5421

323-578-5860

Joseph C Andras

Reg. 33469

Patent attorney

Myers Andras LLP

Irvine, CA · 92612

949-223-9600

Angelica Andreoli

Reg. 75347

Patent attorney

eBay

San Jose, CA · 95125

816-825-8057

Zephyr F Andrew

Reg. 68602

Patent attorney

San Francisco, CA · 94123

415-335-9626

Pierson J Andrews

Reg. 70242

Patent attorney

IP Consultant

Encinitas, CA · 92024

858-775-7158

Raivo H. Andrian

Reg. 79257

Patent agent

Orrick, Herrington & Sutcliffe LLP

San Francisco, CA · 94105-2669

415-773-5408

Robert P Andris· II

Reg. 52562

Patent attorney

Ropers Majeski Kohn and Bentley

Redwood City, CA · 94063

650-364-8200

Jason S Angell

Reg. 51408

Patent agent

Orrick Herrington and Sutcliffe LLP

Menlo Park, CA · 94025

650-614-7638

Benjamin B. Anger

Reg. 62207

Patent agent

Morgan, Lewis & Bockius LLP

Costa Mesa, CA · 92626

714-830-0600

Michael I Angert

Reg. 46522

Patent attorney

Loza & Loza, LLP

Upland, CA · 91786

714-453-9824

Stephanie Angkadjaja

Reg. 74857

Patent attorney

Katten Muchin Rosenman LLP

Los Angeles, CA · 90067

310-788-4482

Justin L. Anglin

Reg. 83594

Patent agent

East Palo Alto, CA · 94303

832-594-2551

Andrew A Anissi

Reg. 57316

Patent attorney

Pasadena, CA · 91105

585-820-6708

Brian J Ankenbrandt

Reg. 41586

Patent attorney

Apple Inc.

Cupertino, CA · 95014

669-276-0730

John B. Annaloro

Reg. 76353

Patent agent

ChromaCode, Inc.

Carlsbad, CA · 92008

206-496-2752

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.