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 Dechert LLP, Hover Inc., and O'Melveny & Myers, LLP.

Top cities in California

All practitioners in California

Joel C Solbach

Reg. 70024

Patent agent

Temecula, CA · 92592

951-764-9343

Benjamin B. Solter

Reg. 67959

Patent attorney

Walnut Creek, CA · 94596

781-752-6369

Conrad R Solum· Jr

Reg. 20467

Patent attorney

Pacific Palisades, CA · 90272

310-454-0035

Lina F. Somait

Reg. 71637

Patent attorney

Los Angeles, CA · 90012

213-351-7529

Howard Neal Sommers

Reg. 24138

Patent attorney

Calabasas, CA · 91302

818-222-5439

Jeffrey S Sommers

Reg. 68830

Patent attorney

Hover Inc.

San Francisco, CA · 94104

858-200-5912

Erika H. Son

Reg. 81753

Patent agent

San Jose, CA · 95126

408-455-9935

Hyo Min Son

Reg. 75679

Patent agent

Santa Clara, CA · 95054

408-318-2661

Jong I Son

Reg. 76016

Patent attorney

O'Melveny & Myers, LLP

Los Angeles, CA · 90071

213-700-3040

Eddy J Song

Reg. 43144

Patent attorney

Illumina, Inc.

San Diego, CA · 92122

858-202-4500

Hochan Song

Reg. 67824

Patent agent

Knobbe Martens Olson & Bear LLP

Irvine, CA · 92614

949-760-0404

Jae Won Song

Reg. 59070

Patent attorney

Fenwick & West LLP

Mountain View, CA · 94041

650-335-7164

James Y Song

Reg. 37731

Patent attorney

Pioneer Electronics (USA) Inc.

Torrance, CA · 90504

310-952-3307

Jane Inyoung Song

Reg. 48073

Patent attorney

Paul Hastings, LLP

San Diego, CA · 92121

858-458-3043

L. Jacob Song

Reg. 68285

Patent attorney

Kutak Rock LLP

Irvine, CA · 92614

949-417-0979

Osok Song

Reg. 78183

Patent attorney

Qualcomm Inc.

San Diego, CA · 92121

858-209-5183

Paul J Song

Reg. 64736

Patent agent

Los Angeles, CA · 90094

626-260-7366

Seorim Song

Reg. 77795

Patent agent

Inglewood, CA · 90301

682-597-8807

Seungtaik M Song

Reg. 54684

Patent attorney

Dechert LLP

Mountain View, CA · 94040-1499

650-813-4800

Victor Lee Song

Reg. 52237

Patent attorney

So. San Francisco, CA · 94080

650-243-5400

Richard A Sonnentag

Reg. 36283

Patent agent

Google Inc.

Mountain View, CA · 94043

847-707-1687

Radhika Sood

Reg. 57569

Patent attorney

Arnold & Porter LLP

Los Angeles, CA · 90017

213-243-4236

James W Soong

Reg. 40824

Patent attorney

Sheppard MullinRichter & Hampton LLP

Palo Alto, CA · 94301-1479

650-815-2600

Justin J Sorensen

Reg. 78105

Patent attorney

Foley & Lardner

San Diego, CA · 92130

858-847-6728

Margareta K. Sorenson

Reg. 71601

Patent attorney

Amgen Inc.

Thousand Oaks, CA · 91320

215-206-0402

Joseph Michael Sorrentino

Reg. 32598

Patent attorney

San Diego, CA · 92101

914-907-9711

Vincent P. Sorrentino

Reg. 79525

Patent attorney

Vincent Sorrentino

San Diego, CA · 92101

619-356-0603

Joseph W Sosinski

Reg. 62807

Patent attorney

Apple Inc.

Cupertino, CA · 95014

408-783-0206

Barbara Sosnowski

Reg. 47103

Patent agent

Coronado, CA · 92118

619-823-0071

Anthony E. Sotelo

Reg. 81489

Patent attorney

Dechert LLP

Palo Alto, CA · 94306

165-081-34818

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.