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 Cognition IP, Takeda California, Inc., and Tucker Ellis LLP.

Top cities in California

All practitioners in California

Edward D Steakley

Reg. 47964

Patent attorney

Cognition IP

San Francisco, CA · 94105

408-504-4718

Diana M Steel

Reg. 43153

Patent attorney

Takeda California, Inc.

San Diego, CA · 92121

619-930-8347

David J Steele

Reg. 47317

Patent attorney

Tucker Ellis LLP

Los Angeles, CA · 90071-2223

213-430-3400

George L Steele

Reg. 43154

Patent attorney

Law Offices of George L. Steele

Pasadena, CA · 91101

626-405-4860

Gina M Steele

Reg. 50827

Patent attorney

Gina M. Steele Attorney At Law

San Francisco, CA · 94104

415-283-3335

Darryl H Steensma

Reg. 43155

Patent attorney

Latham & Watkins LLP

San Diego, CA · 92130

858-523-3926

Audrey L Steever

Reg. 78376

Patent agent

Fremont, CA · 94536

408-829-1623

Charles Evans Steffey

Reg. 25179

Patent attorney

San Francisco, CA · 94131

415-656-7861

William Carl Steffin

Reg. 26811

Patent attorney

Steffin Azod LLP

Los Angeles, CA · 90067

213-507-9796

Alexander B Stein

Reg. 71397

Patent attorney

Morgan, Lewis, & Bockius LLP

Palo Alto, CA · 94304

650-843-7278

David J Stein

Reg. 47965

Patent attorney

FMA, LLP

Santa Monica, CA · 90404

216-262-2919

James D. Stein

Reg. 65222

Patent attorney

Quinn Emanuel Urquhart Oliver

Los Angeles, CA · 90017

213-443-3169

Kenneth L Stein

Reg. 38625

Patent attorney

Santa Monica, CA · 90405

805-456-5552

Eran Steinberg

Reg. 53637

Patent agent

San Francisco, CA · 94127

415-902-7026

Nisan A Steinberg

Reg. 40345

Patent attorney

Law Offices of Nisan Steinberg

Tarzana, CA · 91356

310-866-7817

Robert Steinberg

Reg. 33144

Patent attorney

Latham and Watkins

Los Angeles, CA · 90071

213-485-1234

Galina Steinberg-Tatman

Reg. 71238

Patent attorney

Jones Day

San Diego, CA · 92121

858-703-3135

Otto L Steinbusch

Reg. 64199

Patent attorney

DEXCOM INC.

San Diego, CA · 92121-4356

858-200-0200

Alessandro Steinfl

Reg. 56448

Patent attorney

Steinfl & Bruno

Pasadena, CA · 91101

626-792-0536

Paul Christopher Steinhardt

Reg. 30806

Patent attorney

Carlsbad, CA · 92009

760-944-1704

Rachel C. Steinhardt

Reg. 84123

Patent agent

Solana Beach, CA · 92075

760-402-8580

Karl M Steins

Reg. 40186

Patent attorney

Steins and Associates

La Mesa, CA · 91942

619-252-5070

Laurie B. F. Stellman

Reg. 66817

Patent agent

Swiss Tanner, P.C.

Los Altos, CA · 94022

650-350-2699

Paul S Stellman

Reg. 68287

Patent attorney

Knobbe Martens Olson & Bear, LLP

Irvine, CA · 92614

415-954-4114

Daniel Clement Stelter

Reg. 40830

Patent attorney

Arentt Fox LLP

San Francisco, CA · 94104

415-425-5506

Katharina F S Stengel

Reg. 78337

Patent agent

Caribou Biosciences, Inc.

Berkeley, CA · 94710

510-982-6030

Kenneth P Stensland

Reg. 75163

Patent attorney

Dentons US LLP

San Francisco, CA · 94105-1101

415-267-4000

James Patrick Healy Stephens

Reg. 75906

Patent attorney

Mintz Levin

San Diego, CA · 92130

858-314-1500

Michael C Stephens· Jr

Reg. 45131

Patent attorney

Los Gatos, CA · 95033

408-353-9570

Julie A Stephenson

Reg. 41330

Patent attorney

Intuitive Surgical

Sunnyvale, CA · 94086

408-523-8087

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.