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 Law Office Of Glenn R. Smith, PCT Learning Center, LLC, and GSS Law Group.

Top cities in California

All practitioners in California

Erik C. Smith

Reg. 65622

Patent agent

San Francisco, CA · 94115

415-577-8801

Gary L Smith

Reg. 39472

Patent agent

PCT Learning Center, LLC

San Diego, CA · 92101

571-212-3868

Glenn R Smith

Reg. 38308

Patent attorney

Law Office Of Glenn R. Smith

Trabuco Canyon, CA · 92679

949-709-7164

Gregory S Smith

Reg. 38309

Patent attorney

GSS Law Group

Newark, CA · 94560

510-742-7417

Hans P Smith

Reg. 67259

Patent attorney

Avanir Pharmaceuticals

Aliso Viejo, CA · 92656

949-416-6852

Jared A Smith

Reg. 73749

Patent attorney

Fish & Richardson P.C.

San Diego, CA · 92130

858-678-4702

Jeffrey C Smith

Reg. 53609

Patent agent

Omnica CORP

Irvine, CA · 92618

949-472-0275

Jessica W Smith

Reg. 39884

Patent attorney

Loza & Loza, LLP

Upland, CA · 91786

714-453-9824

Jonathan M Smith

Reg. 73909

Patent attorney

Morrison & Foerster, LLP

Los Angeles, CA · 90017

213-892-5224

Kathy S Smith

Reg. 53610

Patent agent

La Jolla, CA · 92037

858-459-3684

Lee-Ann M. Smith

Reg. 72410

Patent attorney

Delfi Diagnostics, Inc.

Palo Alto, CA · 94303

800-589-2182

Lillian L Smith

Reg. 53176

Patent attorney

Allogene Therapeutics, Inc.

South San Francisco, CA · 94080

650-457-2700

Lisa Leiliu Smith

Reg. 54277

Patent attorney

Law Office Of Glenn R. Smith

Trabuco Canyon, CA · 92679

949-709-7164

Lorraine C Smith

Reg. 53613

Patent agent

ITT Gilfillan

Reseda, CA · 91335

818-993-4954

Michael J. Smith

Reg. 67296

Patent attorney

Hayward, CA · 94541

530-624-5906

Michael T Smith

Reg. 56446

Patent attorney

Michael T. Smith, Esq., Attorney at Law

Glendora, CA · 91741

626-771-7660

Michael G Smith

Reg. 44422

Patent agent

Rimon Law

San Diego, CA · 92121

800-930-7271

Michael S Smith

Reg. 74871

Patent attorney

Illumina, Inc.

San Diego, CA · 92122

858-202-4500

Nathan S Smith

Reg. 53615

Patent attorney

McDermott Will & Emery

Irvine, CA · 92614

949-757-6018

Pamela C Smith

Reg. 37726

Patent attorney

BioBright Consulting LLC

LOS ALTOS, CA · 94024

650-823-4082

Raymond D Smith

Reg. 55634

Patent agent

Knobbe, Martens, Olson & Bear, LLP

Irvine, CA · 92614

949-760-0404

Robert Samuel Smith

Reg. 31305

Patent agent

San Jose, CA · 95126

408-287-1894

Ryan T. Smith

Reg. 81414

Patent agent

RT Smith

San Diego, CA · 92169

951-218-0301

Ryan R Smith

Reg. 55635

Patent attorney

Wilson Sonsini Goodrich & Rosati

Palo Alto, CA · 94304

650-493-9300

Ryan D. Smith

Reg. 79208

Patent agent

San Jose, CA · 95126

303-882-1013

Ryan C Smith

Reg. 72411

Patent attorney

Duane Morris

San Diego, CA · 92101-4681

619--74-4-2220

Steven L Smith

Reg. 44343

Patent attorney

O'Banion & Ritchey

Sacramento, CA · 95814

916-498-1010

Thomas Eugene Smith

Reg. 18243

Patent attorney

Palm Desert, CA · 92211

847-942-1213

Trevor J. Smith

Reg. 83094

Patent agent

San Diego, CA · 92111

619-850-4175

Wayne M Smith

Reg. 42160

Patent attorney

Warner Bros. Entertainment Inc.

Burbank, CA · 91522

818-954-6007

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.