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 MLO, a professional corportation, Haynes Beffel and Wolfeld LLP, and Patent Strategies.

Top cities in California

All practitioners in California

Stephen C Durant

Reg. 31506

Patent attorney

MLO, a professional corportation

San Diego, CA · 92121

858-481-1883

Paul A Durdik

Reg. 37819

Patent attorney

Haynes Beffel and Wolfeld LLP

Half Moon Bay, CA · 94019

650-479-9245

Edward G Durney

Reg. 37611

Patent attorney

Patent Strategies

Millbrae, CA · 94030

650-244-9621

David Isaiah Duron

Reg. 79226

Patent attorney

Sacramento, CA · 95825

520-307-3292

Stephanie S Dusaban Gonzales

Reg. 75016

Patent attorney

Antheros Legal Advisors LLP

San Diego, CA · 92122

858-275-8657

David T Dutcher

Reg. 51638

Patent attorney

Sandisk

Milpitas, CA · 95035

801-232-2912

G Leland Dutcher· Jr

Reg. 43598

Patent attorney

Nissan North America, Inc.

Torrance, CA · 90502

310-768-1218

Rabindranath Dutta

Reg. 51010

Patent agent

Konrad, Raynes, Davda & Victor LLP

Los Angeles, CA · 90064

310-557-2292

Sanjeet K Dutta

Reg. 46145

Patent attorney

Goodwin Procter LLP

Redwood City, CA · 94063

650-752-3260

Peyali Dutta Chowdhury

Reg. 73406

Patent agent

Inskeep Intellectual Property Group

Torrance, CA · 90504

310-755-7800

Dan M Duval

Reg. 70345

Patent attorney

Tesla

Palo Alto, CA · 94304

555-555-5555

Robert S Dweck

Reg. 34588

Patent attorney

Rancho Santa Fe, CA · 92067

858-759-8435

Gregory E Dwulet

Reg. 80541

Patent agent

Calyx Law

San Francisco, CA · 94110

650-796-9040

Arthur P. Dykhuis

Reg. 68325

Patent attorney

McDermott Will & Schulte LLP

San Diego, CA · 92130

949-989-8292

Tyler M. Dylan-Hyde

Reg. 37612

Patent attorney

Taxus Cardium Pharmaceuticals Group Inc.

San Diego, CA · 92121

858-436-1000

Alissa M Eagle

Reg. 37126

Patent attorney

Monsanto Company

Woodland, CA · 95695

530-669-6167

James E Eakin

Reg. 27874

Patent attorney

Law Offices of James E. Eakin

Menlo Park, CA · 94025

650-326-4350

David John Earp

Reg. 41401

Patent attorney

Geron, Corp.

Menlo Park, CA · 94025

650-473-7721

Julie R Eason

Reg. 74685

Patent attorney

San Diego, CA · 92129

619-647-6468

Mathew C Easterday

Reg. 70957

Patent attorney

Dovetail Genomics LLC

Santa Cruz, CA · 95060

612-600-0213

Robert D Eastham

Reg. 31247

Patent attorney

Fort Bragg, CA · 95437

443-867-2827

Gary L Eastman

Reg. 41005

Patent attorney

Gary L. Eastman, APLC

San Diego, CA · 92101

619-230-1144

Jon Eastman

Reg. 58296

Patent agent

Beverly Hills, CA · 90210

310-738-5300

Jessica Eastwood

Reg. 81549

Patent attorney

Orrick Herrington & Sutcliffe LLP

San Francisco, CA · 94105

415-773-5544

David D Eaton

Reg. 55794

Patent attorney

San Jose, CA · 95127

408-499-7075

Kristin S. Eaton

Reg. 51561

Patent agent

San Diego, CA · 92128

858-735-6992

Lauren May Eaton

Reg. 68214

Patent attorney

Baker Botts L.L.P.

Palo Alto, CA · 94304

650-739-7520

Shelley P Eberle

Reg. 31411

Patent attorney

San Mateo, CA · 94401

650-401-6176

Alejandro D. Echeverria

Reg. 81576

Patent attorney

La Jolla, CA · 92037

619-213-4016

James R Eckel

Reg. 29491

Patent agent

Culver City, CA · 90230

310-839-0108

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.