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 Altos Labs, Inc., Charmasson, Buchaca & Leach LLP, and Inventure.

Top cities in California

All practitioners in California

Bryan W Jones

Reg. 66992

Patent attorney

Altos Labs, Inc.

San Diego, CA · 92121

202-699-1609

Denise E Jones

Reg. 45362

Patent attorney

Charmasson, Buchaca & Leach LLP

San Diego, CA · 92108

619-294-2922

Jennifer D Jones

Reg. 51055

Patent attorney

Inventure

Santa Moncia, CA · 90403

818-749-7691

Josetta I Jones

Reg. 51368

Patent attorney

Chevron Corporation

San Ramon, CA · 94583-2324

925-842-1593

Kevin C Jones

Reg. 55308

Patent attorney

Enphase Energy, Inc.

Fremont, CA · 94538

650-867-7776

Kevin T Jones

Reg. 73475

Patent agent

Morrison and Foerster LLP

San Franciso, CA · 94105

415-268-7483

Michael C Jones

Reg. 63266

Patent attorney

PROCOPIO

Palo Alto, CA · 94304

650-645-9000

Mitchel L Jones

Reg. 63495

Patent attorney

JUUL Labs, Inc.

San Francisco, CA · 94107

312-863-9191

Nobuko Wako Jones

Reg. 72268

Patent attorney

Law Office of Katsuhiro Arai

Lake Forest, CA · 92630

949-457-8296

Rosemarie F Jones

Reg. 46253

Patent attorney

BANK OF AMERICA

Westlake Village, CA · 91361

213-345-9816

Stephen Clinton Jones

Reg. 68808

Patent attorney

Praedicat, Inc.

Los Angeles, CA · 90016

424-672-8903

Jay S. Jongjitirat

Reg. 61147

Patent agent

Kenneth A. Murray, Jr. & Associates

Davis, CA · 95617

Venkata S J Jonnalagadda

Reg. 70663

Patent agent

Menlo Park, CA · 94025

650-793-6305

Jon G. Jonsson

Reg. 67597

Patent attorney

Mahamedi IP Law LLP

Redwood City, CA · 94065

408-236-6648

Christopher S Jordan

Reg. 65809

Patent attorney

Cypress Semiconductor

San Jose, CA · 95134

510-757-6105

Edward M Jordan

Reg. 40666

Patent attorney

Los Angeles City Attorney's Office

Los Angeles, CA · 90012

213-978-8152

Damien D Jorgensen

Reg. 67663

Patent attorney

Mdxhealth, Inc.

Irvine, CA · 92618

949-812-6979

Kemarie Jorgensen

Reg. 82404

Patent attorney

Knobbe Martens Olson & Bear

Irvine, CA · 92614

212-849-3060

Norman Eric Jorgensen

Reg. 37158

Patent attorney

Law Office of N Eric Jorgensen

San Jose, CA · 95132

408-929-4058

Matthew S Jorgenson

Reg. 54203

Patent attorney

Boston Scientific Corporation

Valencia, CA · 91355

310-272-8413

Ariana Jorissen

Reg. 50132

Patent attorney

Advanced Bionics, LLC

Valencia, CA · 91335

661-362-4514

Parisa Jorjani

Reg. 46813

Patent attorney

Morrison & Foerster LLP

San Francisco, CA · 94105

415-268-7000

Daryl Craig Josephson

Reg. 37365

Patent attorney

San Carlos, CA · 94070

650-888-3737

Kaushik M. Joshi

Reg. 66761

Patent agent

Tustin, CA · 92780

517-897-5921

Kiran Joshi

Reg. 75650

Patent agent

Quantumscape

San Jose, CA · 95110

408-623-6240

Mandar A Joshi

Reg. 79149

Patent attorney

Bozicevic Field & Francis LLP

Redwood City, CA · 94065

650-833-7712

Peter Jovanovic

Reg. 69128

Patent attorney

Dell, Inc.

Santa Clara, CA · 95054

408-755-8028

Florence Jovic

Reg. 65572

Patent attorney

Cytokinetics

South San Francisco, CA · 94080

650-624-3000

Gerald Patrick Joyce· III

Reg. 37648

Patent attorney

Qualcomm Incorporated

San Diego, CA · 92121

858-845-2204

Timothy H Joyce

Reg. 38197

Patent attorney

Bayer West Coast Corporation

Berkeley, CA · 94710

510-705-7797

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.