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 Genentech, Wilson Sonsini Goodrich & Rosati, and Structure Therapeutics Inc..

Top cities in California

All practitioners in California

Tao Fan

Reg. 78811

Patent agent

Fremont, CA · 94536

650-245-3174

Wenhong Fan

Reg. 56899

Patent agent

Cupertino, CA · 95014

650--46-4-1416

Alex C Fang

Reg. 67124

Patent attorney

Oakland, CA · 94611

510-717-1541

Carol A Fang

Reg. 48631

Patent attorney

Genentech

South San Francisco, CA · 94080-4990

650-467-2901

Pengshu Fang

Reg. 84046

Patent agent

Wilson Sonsini Goodrich & Rosati

San Diego, CA · 92130

619-742-8962

Ralf Fang

Reg. 65431

Patent agent

Structure Therapeutics Inc.

South San Francisco, CA · 94080

650-714-3161

Ronald L. Fantroy· Jr.

Reg. 74957

Patent attorney

San Francisco, CA · 94109

205-908-2817

Farshad Jason Far-Hadian

Reg. 42523

Patent attorney

Mintz Levin

San Diego, CA · 92130

858-314-2144

C Joseph Faraci

Reg. 32350

Patent attorney

Laguna Niguel, CA · 92677

949-481-0300

David A Farah

Reg. 38134

Patent attorney

Pasadena, CA · 91105

323-258-8855

Raffaella Faraoni

Reg. 72232

Patent attorney

Jones Day

San Diego, CA · 92121

858-314-1153

Dawn L Farber

Reg. 51665

Patent attorney

San Rafael, CA · 94901

Michael Bruce Farber

Reg. 32612

Patent attorney

Lowry Blixseth APC

Agoura Hills, CA · 91301

818-584-6460

Frederic J Farina

Reg. 48467

Patent agent

California Institute Of Technology

Pasadena, CA · 91125

626-395-3058

Alissa Heather Faris

Reg. 60791

Patent attorney

Arnold & Porter, LLP

Palo Alto, CA · 94304

415-356-3024

Susan K Faris

Reg. 41739

Patent attorney

Belmont, CA · 94002

650-654-7998

Farshad Farjami

Reg. 41014

Patent attorney

Farjami and Farjami, LLP

Mission Viejo, CA · 92691

949-282-1000

Michael Farjami

Reg. 38135

Patent attorney

Farjami & Farjami LLP

Mission Viejo, CA · 92691

949-282-1000

Alexander M Farkas

Reg. 74705

Patent agent

Rancho Santa Fe, CA · 92067

760-525-7237

Michael W Farn

Reg. 41015

Patent attorney

Fenwick and West, LLP

Mountain View, CA · 94041

650-335-7823

Omair Maqsood Farooqui

Reg. 51666

Patent attorney

Ellahie & Farooqul LLP

San Jose, CA · 95113

408-294-0404

Ryan N Farr

Reg. 52882

Patent attorney

QUALCOMM Incororated

San Diego, CA · 92121

858-845-8384

James R Farrand

Reg. 38136

Patent attorney

Santa Monica, CA · 90402

310-458-9122

Janet Elizabeth Farrant

Reg. 32453

Patent agent

MTR Inc.

Newark, CA · 94560

650-543-3348

Joseph Shahram Farzam

Reg. 47282

Patent attorney

Law Offices Of Farzam and Assocs

Los Angeles, CA · 90067

310-226-6890

Alvin Victor Fashu Kanu

Reg. 58786

Patent attorney

Seyfarth Shaw LLP

Los Angeles, CA · 90067-3021

310-201-1530

Charles J Fassbender

Reg. 28504

Patent attorney

Poway, CA · 92064

858-748-3092

Lawrence J Fassler

Reg. 47556

Patent attorney

San Francisco, CA · 94123

415-928-6325

Kamran Fattahi

Reg. 35758

Patent attorney

Law Offices of Kamran Fattahi

Sherman Oaks, CA · 91403

818-205-0140

Aidan Z. Faustina

Reg. 82439

Patent agent

Perkins Coie

Palo Alto, CA · 94304

650-838-4359

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.