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 Providentia Law PC, Eckhoff & Hoppe, and Mintz.

Top cities in California

All practitioners in California

William Glenwood Johnson

Reg. 39525

Patent attorney

Providentia Law PC

Mountain View, CA · 94040

206-910-6034

Bruce Howard Johnsonbaugh

Reg. 24982

Patent attorney

Eckhoff & Hoppe

Walnut Creek, CA · 94596

415-391-7160

Erin L. Johnston

Reg. 82639

Patent agent

Carlsbad, CA · 92011

858-867-7114

James A. Johnston

Reg. 79172

Patent attorney

Mintz

Los Angeles, CA · 90067

310-226-7869

Nichole R. Johnston

Reg. 83529

Patent agent

Knobbe Martens

San Diego, CA · 92130

858-707-4000

Rowland William Johnston· Jr

Reg. 17968

Patent attorney

Pasadena, CA · 91107

626-792-2604

Sean Andrew Johnston

Reg. 35910

Patent attorney

Hillsborough, CA · 94010

650-270-0136

Katherine D. Joiner

Reg. 69261

Patent agent

Buchalter

Los Angeles, CA · 90017

407-619-2904

Alex C. Jolly

Reg. 82562

Patent attorney

Newport Beach, CA · 92660

949-631-6713

Thomas A Jolly

Reg. 39241

Patent attorney

Qualcomm Incorporated

San Diego, CA · 92121

858-651-9797

Allston Lee Jones

Reg. 27906

Patent attorney

Peters Verny, LLP

Palo Alto, CA · 94306

650-324-1677

Anthony P Jones

Reg. 59521

Patent attorney

Park, Vaughan, Fleming & Dowler LLP

Lafayette, CA · 94549

925-310-4672

Brian E Jones

Reg. 51855

Patent attorney

Western Digital Technologies, Inc.

Irvine, CA · 92612

949-672-7869

Bridget M. Jones

Reg. 61269

Patent attorney

Sacramento, CA · 95814

279-217-0794

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

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.