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 Snell & Wilmer LLP, Element Biosciences, and Calyx Law LLP.

Top cities in California

All practitioners in California

Roberta D German

Reg. 43902

Patent agent

Element Biosciences

San Diego, CA · 92121

619-353-0300

Matthew Gerpheide

Reg. 79304

Patent agent

Oceanside, CA · 92056

805-423-6146

Frank L. Gerratana

Reg. 62653

Patent attorney

Calyx Law LLP

San Francisco, CA · 94105

617-294-9735

Karin M Gerstin

Reg. 54119

Patent attorney

Wilson Sonsini Goodrich & Rosati

San Diego, CA · 92130

858-350-2300

Jason A. Gersting

Reg. 65890

Patent attorney

Snell & Wilmer LLP

Costa Mesa, CA · 92614

714-427-7000

Marguerite E Gerstner

Reg. 32695

Patent attorney

TE Connectivity Corporation

Fremont, CA · 94555

650-361-2483

Michael E Gertner

Reg. 58276

Patent agent

Menlo Park, CA · 94026

650-283-9388

Albin H Gess

Reg. 25726

Patent attorney

Snell & Wilmer LLP

Costa Mesa, CA · 92626

714-427-7020

Derek D Gess

Reg. 71463

Patent agent

Yorba Linda, CA · 92886

714-340-3130

Henock Gessesse

Reg. 44705

Patent attorney

Broadcom, Corp.

Sunnyvale, CA · 94086

408-543-3300

Nancy Jean Gettel

Reg. 57481

Patent attorney

Amgen, Inc.

Thousand Oaks, CA · 91320

805-447-9923

Jason E Gettleman

Reg. 55202

Patent attorney

Morgan, Lewis & Bockius LLP

Palo Alto, CA · 94304

650-843-7593

Christopher S Geyer

Reg. 74346

Patent attorney

Scale LLP

San Francisco, CA · 94104

415-735-5933

Seema J. Ghatnekar

Reg. 72647

Patent agent

Riverside, CA · 92506

951-505-8762

Faryar Ghazanfari

Reg. 60759

Patent attorney

San Ramon, CA · 94582

925-323-5859

Polene Ghazarian

Reg. 77534

Patent attorney

Glendale, CA · 91204

818-426-6162

Anca Carmen Gheorghiu

Reg. 44120

Patent attorney

Applied Materials, Inc.

Santa Calra, CA · 95054

408-563-0959

Asif U. Ghias

Reg. 73599

Patent agent

Novato, CA · 94949

415-269-3032

Biswajit Ghose

Reg. 72355

Patent agent

Qualcomm Technologies Incorporated

San Diego, CA · 92121

858-658-1698

Shameek Ghose

Reg. 61802

Patent attorney

Genentech, Inc.

South San Francisco, CA · 94080

Indraneel Ghosh

Reg. 64516

Patent attorney

Skadden, Arps, Slate, Meagher & Flom, LLP & Affiliates

Palo Alto, CA · 94301

650-470-4557

Samantak Ghosh

Reg. 80509

Patent agent

Gilead Sciences, Inc.

Foster City, CA · 94404

650-522-4035

Maximilienne Giannelli

Reg. 57286

Patent attorney

McNeill PLCC

San Diego, CA · 92108

619-588-2849

Rochelle A Gibbons

Reg. 45611

Patent agent

Olin Consulting Group

Portola Valley, CA · 94025

650-996-4312

Franklin E Gibbs

Reg. 44709

Patent attorney

Gibbs & White P.C.

Irvine, CA · 92614

714-632-1490

James A Giblin

Reg. 25772

Patent attorney

Pleasant Hill, CA · 94523

925-933-2135

Daniel V. Gibson

Reg. 68329

Patent attorney

Knobbe Martens Olson & Bear LLP

Irvine, CA · 92614

949-760-0404

Donald R. Gibson

Reg. 59564

Patent agent

Patent-Tech

Palm Desert, CA · 92260

925-989-1165

Hal W Gibson

Reg. 57034

Patent attorney

K&L Gates LLP

Irvine, CA · 92614

949-253-0900

Melissa R. Gibson

Reg. 80315

Patent attorney

Amgen

Thousand Oaks, CA · 91320

805-233-5200

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.