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 Fabric8Labs, Squire, Patton Boggs (US) LLP, and DoorDash, Inc..

Top cities in California

All practitioners in California

Charles N Pateros

Reg. 50677

Patent agent

Fabric8Labs

San Diego, CA · 92121

760-889-9918

Rahul Pathak

Reg. 42983

Patent attorney

Squire, Patton Boggs (US) LLP

Palo Alto, CA · 94304

650-856-6500

Sneha Y. Pathak

Reg. 71997

Patent agent

Fremont, CA · 94539

510-449-1637

Sanjay Pathiyal

Reg. 63470

Patent attorney

DoorDash, Inc.

San Francisco, CA · 94107

650-762-5264

Steven C Patrick

Reg. 40341

Patent attorney

M. J. Ram & Associates

Bell Canyon, CA · 91307

805-206-7020

Melissa E. Patterson

Reg. 67455

Patent attorney

Dexcom, Inc.

San Diego, CA · 92121

415-800-9201

Aaron L Patton

Reg. 46293

Patent attorney

Long Beach, CA · 90807

562-427-1553

Judd Morrison Patton

Reg. 77310

Patent attorney

Torrance, CA · 90505

310-560-1170

Stephana E Patton

Reg. 50373

Patent attorney

Eiger Biopharmaceuticals, Inc.

Palo Alto, CA · 94306

857-205-0052

Herbert T Patty

Reg. 62083

Patent attorney

San Jose, CA · 95126

408-886-5109

Priscilla Pau

Reg. 81969

Patent agent

Cupertino, CA · 95050

408-544-5048

Darcy August Paul

Reg. 50871

Patent attorney

Paul Law Group, P.C.

Santa Clara, CA · 95051

408-617-0800

James W Paul

Reg. 29967

Patent attorney

Fulwider Patton LLP

Los Angeles, CA · 90045

310-824-5555

John M. Paul

Reg. 83651

Patent attorney

San Francisco, CA · 94131

415-307-9682

Nicholas John Pauley

Reg. 44999

Patent attorney

Qualcomm, Inc.

San Diego, CA · 92130

858-845-8405

David C Pauling

Reg. 56056

Patent attorney

Jones Day

Palo Alto, CA · 94403

650-739-3949

John Mark Pauly

Reg. 43850

Patent agent

258 Packard Electrical Engineering

Stanford, CA · 94305

650-723-4569

Joseph M Paunovich

Reg. 59033

Patent attorney

Quinn Emanuel Urquhart Oliver & Hedges LLP

Los Angeles, CA · 90017

213-443-3000

Kevin J Pavlik

Reg. 66179

Patent attorney

Ervin Cohen & Jessup LLP

Beverly Hills, CA · 90212

310-281-6322

Julie R. Paxman

Reg. 83783

Patent agent

Womble Bond Dickinson

Irvine, CA · 92618

858-313-1411

Susan R Payne

Reg. 52033

Patent attorney

Motorola Mobility Inc.

San Diego, CA · 92121

858-404-2177

Rosy M Pazdera

Reg. 46984

Patent attorney

Lyell Immunopharma, Inc

South San Francisco, CA · 94080

650-243-7951

Ferenc Pazmandi

Reg. 66216

Patent agent

Baker Botts L.L.P.

San Francisco, CA · 94111

415-291-6255

James Clayton Peacock· III

Reg. 40124

Patent agent

Law Office of James C. Peacock, III

San Carlos, CA · 94070

650-591-9991

Paul J Pearah

Reg. 55884

Patent attorney

Pillsbury Winthrop Shaw Pittman LLP

San Diego, CA · 92130-4088

858-509-4008

Jonathan Parker Pearce

Reg. 60972

Patent attorney

SoCal IP Law Group LLP

Westlake Village, CA · 91362

805-230-1350 X 350

Ann Maria Caviani Pease

Reg. 42067

Patent attorney

Dechert LLP

Mountain View, CA · 94040

650-813-4900

Graham M Pechenik

Reg. 67000

Patent attorney

Calyx Law

San Francisco, CA · 94110

415-805-2270

John Walter Peck

Reg. 44284

Patent attorney

KPPB LLP

Anaheim, CA · 92806

949-852-0000

Lawrence J Peck

Reg. 64689

Patent attorney

Belmont, CA · 94002

650-766-5741

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.