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 Cisco System, Inc., Sheppard Mullin, and Goodwin Procter LLP.

Top cities in California

All practitioners in California

John Adrian Palmer

Reg. 36885

Patent attorney

Diamond Bar, CA · 91765

909-861-7106

Timothy Andrew Palmer

Reg. 60931

Patent agent

Mountain View, CA · 94043

650-253-0000

Julian Y Palmor

Reg. 35312

Patent agent

Los Altos, CA · 94022-2336

650-948-4524

Judy Y. Pan

Reg. 83650

Patent agent

Berkeley, CA · 94709

408-916-8820

Pamela L Pan

Reg. 61858

Patent agent

Cisco System, Inc.

San Jose, CA · 95134

408-757-8880

Yichuan Pan

Reg. 53428

Patent agent

San Diego, CA · 92128

858-248-7078

Yu Pan

Reg. 79941

Patent agent

Sheppard Mullin

San Diego, CA · 92130

540-553-1659

Jacob J. Panangat

Reg. 75674

Patent attorney

Goodwin Procter LLP

Los Angeles, CA · 90017

213-426-2500

Daniel P. Panasenko

Reg. 81522

Patent agent

DLA Piper LLP

San Francisco, CA · 94105

415-615-6109

Deepti Panchawagh-Jain

Reg. 43846

Patent attorney

The Law Office of Deepti Panchawagh-Jain

San Jose, CA · 95138

408-528-9603

Hema Pande

Reg. 53429

Patent agent

Beckman Coulter, Inc.

Fullerton, CA · 92834

714-773-7606

Sharmila Manohar Pandharipande

Reg. 61628

Patent agent

Belmont, CA · 94002

650-596-0474

Michael Joseph Panepucci

Reg. 37203

Patent attorney

Wilson Sonsini Goodrich & Rosati

Palo Alto, CA · 94304

650-849-3217

Andrew Y Pang

Reg. 40114

Patent attorney

Advanced Medical Optics

Santa Ana, CA · 92705

714-247-8853

Diane K Pang

Reg. 54550

Patent attorney

One LLP

Newport Beach, CA · 92660

949-502-2870

Isabella W Pang

Reg. 70498

Patent agent

Milpitas, CA · 95035

408-838-2075

Ran Pang

Reg. 79332

Patent agent

San Francisco, CA · 94111

415-735-3674

Stephen Ying-Fang Pang

Reg. 38575

Patent attorney

OGAWA Professional Corporation

Palo Alto, CA · 94301

650-868-8326

Matthew D Pangallo

Reg. 66934

Patent attorney

NAVWAR Office of General Counsel

San Diego, CA · 92110

858-537-0487

Brian J Pangrle

Reg. 42973

Patent attorney

Pangrle Patent, Brand & Design Law, PC

Burbank, CA · 91505

818-395-4194

Rajendra B Panwar

Reg. 63165

Patent agent

Fenwick and West, LLP

Mountain View, CA · 94041

650-335-7107

Curtis C Panzer

Reg. 33752

Patent attorney

Inception Sciences, Inc.

San Diego, CA · 92121

858-224-7718

Kimberly M. Papadantonakis

Reg. 84054

Patent attorney

Knobbe, Martens, Olson & Bear, LLP

Irvine, CA · 92614

310-551-3450

Chris Papageorge

Reg. 30672

Patent attorney

Gardena, CA · 90247

310-324-9890

Theodore G Papagiannis

Reg. 61546

Patent attorney

Knobbe, Martens, Olson & Bear LLP

Irvine, CA · 92614

949-760-0404

Khachatur V Papanyan

Reg. 71685

Patent attorney

Hickman Palermo Becker Bingham LLP

San Jose, CA · 95113

408-414-1209

Gus Pappas

Reg. 59944

Patent agent

Los Angeles, CA · 90024

Stephen C Pappas

Reg. 73161

Patent attorney

La Jolla Institute for Immunology

La Jolla, CA · 92037

858-752-6639

William L Paradice· III

Reg. 38990

Patent attorney

Paradice and Li LLP

Campbell, CA · 95011

408-214-1201

David A Parandoosh

Reg. 63289

Patent attorney

Xilinx Inc.

San Jose, CA · 95124

408-879-6539

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.