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 Tope-McKay and Associates, VLP Law Group LLP, and Thermo Fisher Scientific.

Top cities in California

All practitioners in California

Cary Tope-McKay

Reg. 41350

Patent attorney

Tope-McKay and Associates

Malibu, CA · 90265

310-383-7468

Lance A Topham

Reg. 70276

Patent attorney

VLP Law Group LLP

Palo Alto, CA · 94301

385-323-3300

Noorossadat Torabi

Reg. 73061

Patent attorney

Thermo Fisher Scientific

Carlsbad, CA · 92008

141-592-69842

Sahmon Torabi

Reg. 59281

Patent attorney

Dergosits & Noah LLP

San Francisco, CA · 94111

415-705-6377

Timothy E Torchia

Reg. 36700

Patent agent

Genomatica Inc.

San Diego, CA · 92121

858-210-4427

Susanna J Torke

Reg. 66671

Patent attorney

SPAWAR Systems Center Pacific

San Diego, CA · 92152

619-553-3824

Peter J. Tormey

Reg. 57761

Patent attorney

Concord, CA · 94519

925-352-9842

Iris H Torres

Reg. 73700

Patent agent

Haynes and Boone, LLP

San Francisco, CA · 94104

415-293-8929

Jeremiah R Torres

Reg. 68693

Patent attorney

Google Inc.

Mountain View, CA · 94043

650-253-0023

J Vincent Tortolano

Reg. 31433

Patent attorney

Nipomo, CA · 93444

805-219-0058

Paula J Tostado

Reg. 40691

Patent attorney

Adeia Inc

San Jose, CA · 95134

408-656-4972

Carolyn S Toto

Reg. 56817

Patent attorney

Pillsbury Winthrop Shaw Pittman LLP

Los Angeles, CA · 90017

213-488-7238

John D. Toton

Reg. 65228

Patent agent

Los Angeles, CA · 90026

213-797-4768

Libby Z Toub

Reg. 57721

Patent attorney

Sunny Vale, CA · 94086

408-974-5114

Claire Tourkin

Reg. 80447

Patent agent

Cooley LLP

San Francisco, CA · 94111-4004

415-693-2540

Louis Touton

Reg. 32773

Patent attorney

Los Angeles, CA · 90066

310-397-9680

Lee W Tower

Reg. 30229

Patent attorney

Attorney at Law

Rancho Palos Verdes, CA · 90275

310-548-3709

Helen Yiea Trac

Reg. 65250

Patent attorney

San Francisco, CA · 94122

248-495-0021

Tyler Richard Train

Reg. 76108

Patent attorney

Fish & Richardson P.C.

San Diego, CA · 92130

858-678-4326

Bao Q Tran

Reg. 37955

Patent attorney

Tran & Associates

Saratoga, CA · 95071

408-528-7490

David N Tran

Reg. 50804

Patent attorney

Weaver Austin Villeneuve & Sampson

Oakland, CA · 94607

408-476-7664

Hung Tran

Reg. 45581

Patent attorney

Law Office of Hung Ban Tran

Alhambra, CA · 91801

626-308-9308

Hung K Tran

Reg. 67683

Patent agent

San Jose, CA · 95121

408-281-7434

James C Tran

Reg. 46037

Patent attorney

Law Offices of James C. Tran

Huntington Beach, CA · 92648

626-377-2449

Jeannie N. Tran

Reg. 66345

Patent agent

San Jose, CA · 95139

408-826-2571

John D Tran

Reg. 48911

Patent attorney

Rhema Law Group, P.C.

Irvine, CA · 92614

949-852-4430

Khanh Q Tran

Reg. 41352

Patent attorney

BlackBerry

Redwood City, CA · 94065

650-620-2517

Kim Tran

Reg. 68790

Patent agent

Sacramento, CA · 95819

Kimberly Tran

Reg. 74773

Patent attorney

Schwegman Lundberg Woessner

San Jose, CA · 95113

408-660-2985

Loi H. Tran

Reg. 61067

Patent agent

Orion Law Group

San Jose, CA · 95113

408-280-1800

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.