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 Van Pelt, Yi & James LLP, Pfizer, Inc., and Finnegan, Henderson, Farabow, Garrett & Dunner, LLP.

Top cities in California

All practitioners in California

Amita Pugalia

Reg. 57367

Patent agent

Van Pelt, Yi & James LLP

Cupertino, CA · 95014

408-973-2580

Matthew J Pugmire

Reg. 54723

Patent attorney

Pfizer, Inc.

San Diego, CA · 92121

858-638-6349

Erik Raymond Puknys

Reg. 40132

Patent attorney

Finnegan, Henderson, Farabow, Garrett & Dunner, LLP

Palo Alto, CA · 94304-1203

650-849-6600

Robert A. W. Pullman· III

Reg. 75063

Patent agent

Innovation Counsel LLP

Sam Jose, CA · 95134

408-331-1673

Angela L. Purcell

Reg. 60642

Patent attorney

Amgen Inc.

Thousand Oaks, CA · 91320-1799

805-313-2511

Asheesh P Puri

Reg. 53494

Patent attorney

Maynard Nexsen LLP

Los Angeles, CA · 90067

310-596-4344

Elizabeth H Purtill

Reg. 75875

Patent agent

Dolby Labs

San Francisco, CA · 94103

650-315-6897

Robert E Purvy

Reg. 56582

Patent agent

San Jose, CA · 95129

408-257-5120

Kirupa Pushparaj

Reg. 66698

Patent attorney

Square, Inc.

San Francisco, CA · 94103

510-936-3747

Frances R Putkey

Reg. 57257

Patent agent

DTx Pharma, Inc.

San Diego, CA · 92121

858-967-0455

Jonathan M. Putnam

Reg. 60102

Patent agent

ViaSat, Inc.

Carlsbad, CA · 92009

760-893-1614

Luanna K Putney

Reg. 57066

Patent agent

Office of Research Technology

Davis, CA · 95616

530-757-3166

Qi Qi

Reg. 68515

Patent attorney

Fenwick & West LLP

Mountain View, CA · 94041

650-335-7890

Yan Qi

Reg. 73252

Patent attorney

Genentech, Inc.

South San Francisco, CA · 94080

408-517-5726

Fang Qian

Reg. 56744

Patent attorney

Genentech, Inc.,

South San Francisco, CA · 94080

650-441-2078

Feng Qian

Reg. 74942

Patent agent

Irvine, CA · 92620

949-680-6667

Yuchen Qian

Reg. 800026

Limited recognition

Schwegman, Lundberg & Woessner, P.A.

San Jose, CA · 95113

669-306-0602

Fangzhou Qiu

Reg. 82810

Patent attorney

Sheppard, Mullin, Richter & Hampton, LLP

Menlo Park, CA · 94025

650-815-2652

Jia-Ning Qu

Reg. 65901

Patent agent

CUPERTINO, CA · 95014

408-973-2588

Michael William Quade

Reg. 42092

Patent attorney

Quade and Associates

San Diego, CA · 92121

858-642-1700

Baldwin D Quan

Reg. 58692

Patent attorney

Laguna Woods, CA · 92637

949-613-4643

Nancy N Quan

Reg. 36248

Patent attorney

Quan & Associates

North Hills, CA · 91343

310-621-6415

Xina S. Quan

Reg. 72827

Patent agent

Saratoga, CA · 95070

408-215-7361

William Kamrar Quarles· Jr

Reg. 24487

Patent attorney

Hidden Hills, CA · 91302

818-887-2291

Kelly L Quast

Reg. 52141

Patent agent

Deltagen INC

Redwood City, CA · 94063

650-569-5100

Nicholas S. Quatraro

Reg. 84811

Patent agent

Oakland, CA · 94612

520-310-4447

Elena E Quertermous

Reg. 47873

Patent agent

Verinata Health, Inc.

Redwood City, CA · 94063

650-503-5211

Alexandria E. Quezada

Reg. 79066

Patent agent

Bayer U.S. Crop Science

Woodland, CA · 95695

530-312-4436

Michael A Quick

Reg. 65273

Patent attorney

Paradice and Li LLP

Campbell, CA · 95008

669-272-0776

Katherine L. Quigley

Reg. 64458

Patent attorney

LEWIS ROCA ROTHGERBER CHRISTIE LLP

Glendale, CA · 91203-1445

626-795-9900

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.