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 Doubloon Diagnostic Consulting, Shape Security, Inc., and ORRICK, HERRINGTON & SUTCLIFFE LLP.

Top cities in California

All practitioners in California

Erik P Johnson

Reg. 56382

Patent agent

Doubloon Diagnostic Consulting

Oceanside, CA · 92056

858-245-7923

J. Thomas Johnson· III

Reg. 68945

Patent attorney

Shape Security, Inc.

Mountain View, CA · 94040

408-605-4892

Jeffrey L Johnson

Reg. 53078

Patent attorney

ORRICK, HERRINGTON & SUTCLIFFE LLP

Irvine, CA · 92614

713-658-6450

Keith Lowell Johnson

Reg. 34630

Patent attorney

Chatsworth, CA · 91311

818-882-3237

Kevin P B Johnson

Reg. 38927

Patent attorney

Quinn Emanuel Urquhart & Sullivan, LLP

Redwood Shores, CA · 94065

650-801-5000

Larry Joel Johnson

Reg. 56861

Patent attorney

DocuSign

San Francisco, CA · 94105

408-772-7987

Laura J Johnson

Reg. 48208

Patent agent

Idea Rocket Consulting

Poway, CA · 92064

858-352-8913

Lee A Johnson

Reg. 75671

Patent attorney

Wilson Sonsini Goodrich & Rosati

San Diego, CA · 92130

858-344-1785

Leigh E Johnson

Reg. 51853

Patent attorney

Law Offices Of Leigh E. Johnson, A.P.C

Richmond, CA · 94806

510-245-2468

Matthew R Johnson

Reg. 77387

Patent attorney

ASML

San Diego, CA · 92127

405-706-5982

Pia M Johnson

Reg. 45509

Patent agent

Davis, CA · 95616

530-758-8935

Prentiss Wayne Johnson

Reg. 33123

Patent attorney

IBM Corporation

San Jose, CA · 95141

408-463-5673

Rosana S Johnson

Reg. 41095

Patent agent

Foothill Ranch, CA · 92610

949-830-5020

Tiffany A. Johnson

Reg. 73333

Patent attorney

Boston Scientific

Valencia, CA · 91355

817-217-9609

William Glenwood Johnson

Reg. 39525

Patent attorney

Providentia Law PC

Mountain View, CA · 94040

206-910-6034

William L Johnson

Reg. 41876

Patent attorney

DTS, Inc.

Calabasas, CA · 91302

818-436-1336

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

Andrew T Jones

Reg. 70200

Patent attorney

Durie Tangri LLP

Los Angeles, CA · 90013

213-992-4499

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

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.