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 Pillsbury Winthrop Shaw Pittman LLP, Antero, Tormey & Petrin, PC, and US Air Force.

Top cities in California

All practitioners in California

Shiraun K. Jacob

Reg. 69502

Patent attorney

Antero, Tormey & Petrin, PC

Concord, CA · 94523

832-408-1654

David F. Jacobs

Reg. 68733

Patent attorney

US Air Force

Edwards, CA · 93524

480-221-7351

Ericka A. Jacobs

Reg. 60665

Patent attorney

Paul, Hastings, Janofsky & Walker, LLP

San Diego, CA · 92130

858-720-2500

Kurt M Jacobs

Reg. 78677

Patent attorney

Knobbe, Martens, Olson & Bear, LLP

Irvine, CA · 92614

949-721-2994

Mark C Jacobs

Reg. 24043

Patent attorney

Sacramento, CA · 95821

916-485-5000

Matthew L Jacobs

Reg. 57342

Patent attorney

McDermott Will & Emery LLP

Irvine, CA · 92612

949-757-7107

R. Christine Henry Jacobs

Reg. 35204

Patent agent

Cupertino, CA · 95014

408-255-4557

Ron Jacobs

Reg. 50142

Patent agent

Lumen Patent Firm

Palo Alto, CA · 94301

650-424-0100

William D Jacobs· Jr.

Reg. 74758

Patent attorney

Womble Bond Dickinson (US) LLP

Palo Alto, CA · 94303

408-341-3091

Krista S. Jacobsen

Reg. 59374

Patent attorney

Jacobsen IP Law

Campbell, CA · 95008

408-455-5539

Anthony T Jacobson

Reg. 72388

Patent attorney

Fenwick & West, LLP

Mountain View, CA · 94041

650-335-7158

Jill A Jacobson

Reg. 40030

Patent agent

Law Office Of Jill Jacobson

Santa Clara, CA · 95051

408-345-6635

William Orin Jacobson

Reg. 31111

Patent agent

Las Flores, CA · 92688

949-888-5171

Renee D Jacowitz

Reg. 55298

Patent agent

Cohesity

San Jose, CA · 95110

408-250-8898

Jonathan A Jaech

Reg. 41091

Patent attorney

One LLP

Newport Beach, CA · 92660

949-444-5941

David V Jafari

Reg. 51839

Patent attorney

Jafari Law Group, Inc.

Aliso Viejo, CA · 92656

949-362-0100

Mandana Jafarinejad

Reg. 67974

Patent attorney

Walnut, CA · 91789

626-379-5490

William L. Jaffe

Reg. 64977

Patent attorney

Womble Bond Dickinson LLP

Palo Alto, CA · 94304

408-720-3406

David Hussain Jaffer

Reg. 32243

Patent attorney

Pillsbury Winthrop Shaw Pittman LLP

Palo Alto, CA · 94304-1114

650-233-4510

Reshma Jagasia

Reg. 74635

Patent agent

San Diego, CA · 92128

858-405-4038

Bruce Anderson Jagger

Reg. 19968

Patent attorney

Los Angeles, CA · 90045-1050

310-641-5032

Christopher H Jaggers

Reg. 50693

Patent agent

Jet Propulsion Lab

Pasadena, CA · 91109

818-393-4904

Sandeep Jaggi

Reg. 43331

Patent attorney

Health Hero Network, Inc.

Redwood City, CA · 94063

650-779-9105

Cameron Jahansouz

Reg. 76953

Patent attorney

Gunderson Dettmer

Redwood City, CA · 94063

650-321-2400

Rajendra Jaipershad

Reg. 44168

Patent attorney

Applied Mciro Circuits Corperation

Sunnyvale, CA · 94089

408-542-8307

Neha Jaiswal

Reg. 65076

Patent attorney

Bad Juju Games, Inc.

Aliso Viejo, CA · 92656

949-521-7038

Nishant Jaiswal

Reg. 71660

Patent agent

Sunnyvale, CA · 94087

650-336-3329

Kevin W Jakel

Reg. 58790

Patent attorney

Intuit Inc.

Mountain View, CA · 94043

650-944-5896

David Alan Jakopin

Reg. 32995

Patent attorney

Pillsbury Winthrop Shaw Pittman LLP

Palo Alto, CA · 94304-1115

650-233-4790

Peter Joel Jakubowski

Reg. 46419

Patent agent

MPS Engineering

Huntington Beach, CA · 92647

714-841-7501

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.