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 Knobbe, Martens, Olson & Bear, LLP, QSC, LLC, and Kubota & Basol.

Top cities in California

All practitioners in California

Tyler S. Cox

Reg. 76130

Patent agent

Knobbe, Martens, Olson & Bear, LLP

Irvine, CA · 92614

415-217-3516

Christopher M. Coy

Reg. 75968

Patent attorney

QSC, LLC

Costa Mesa, CA · 92626

310-995-5320

Harley M. Cragun

Reg. 82457

Patent agent

Kubota & Basol

Los Angeles, CA · 90017

323-420-8355

Anthony G Craig

Reg. 50342

Patent attorney

SCI- Law Strategies, PC

Solana Beach, CA · 92075

858-847-0115

Barrett Craig

Reg. 44050

Patent attorney

BARRETT CRAIG, ESQ

Huntington Beach, CA · 92648

714-587-9131

Keith C Cramer

Reg. 46647

Patent attorney

Gordon and Rees, LLP

San Diego, CA · 92130

619-230-7748

Linda D Crampton

Reg. 56334

Patent agent

Los Alamitos, CA · 90720

562-596-2273

Craig A Crandall

Reg. 38416

Patent attorney

Craig A Crandall, APC

Newbury Park, CA · 91320

805-405-3121

Jerry A Crandall

Reg. 56765

Patent attorney

Crandall Patent Group, LLC

San Jose, CA · 95110

408-409-0366

Michael L Crapenhoft

Reg. 37115

Patent attorney

Huntington Beach, CA · 92648

949-331-3069

Jonathan P Crawford

Reg. 66605

Patent attorney

Adobe Inc

San Jose, CA · 95110

408-536-2981

Gina H Cremona

Reg. 74844

Patent attorney

Tensegrity Law Group LLP

Redwood Shores, CA · 94065

650-802-6018

Cathy E Cretsinger

Reg. 51588

Patent attorney

KILPATRICK TOWNSEND & STOCKTON LLP

San Francisco, CA · 94111

415-576-0200

Douglas J Crisman

Reg. 39951

Patent attorney

Morgan, Lewis & Bockius LLP

Palo Alto, CA · 94306

650-843-4000

Charlette M Crissman

Reg. 46113

Patent attorney

Crissman Law Office

Bakersfield, CA · 93390

661--85-8-6476

David E Crites

Reg. 64016

Patent agent

Los Gatos, CA · 95032

650-743-2580

Amy L. Crocetti Donati

Reg. 46648

Patent attorney

Aliso Viejo, CA · 92656

412-952-6811

Steven C. Crocker

Reg. 50642

Patent attorney

eBay

San Jose, CA · 95125

408-376-7400

K David Crockett

Reg. 34311

Patent attorney

Crockett & Crockett, PC

Aliso Viejo, CA · 92656

949-588-6171

Susan L Crockett

Reg. 51590

Patent attorney

Crockett & Crockett

Aliso Viejo, CA · 92656

949-588-6171

Jason W Croft

Reg. 65195

Patent attorney

Buchalter

Los Angeles, CA · 90017

213-891-0700

Timothy R Croll

Reg. 36771

Patent attorney

Cypress Semiconductor Corporation

San Jose, CA · 95134-1709

408-545-6942

Scott A Cromar

Reg. 65066

Patent attorney

Knobbe Martens Olson & Bear, LLP

Irvine, CA · 92614

949-721-2812

Chester E Crone

Reg. 41691

Patent attorney

Woodland Hills, CA · 91367

818-710-8521

Cornell D Crosby

Reg. 67168

Patent attorney

Arent Fox LLP

Los Angeles, CA · 90013

213-988-6696

Arnold W Cross

Reg. 74154

Patent agent

Patent Agent Arnold Cross

Buena Park, CA · 90621

714-736-0749

Justin H Cross

Reg. 66911

Patent attorney

Verenium Corporation

San Diego, CA · 92121

858-431-8595

Albert Milton Crowder· Jr

Reg. 28063

Patent attorney

Office Of A. M. Crowder

Petaluma, CA · 94954-5624

503-729-0024

Robert G Crownover

Reg. 63139

Patent attorney

Law Offices of Robert Crownover

Sunnyvale, CA · 94086-0272

650-430-4542

John F. Cruikshank· III

Reg. 60842

Patent attorney

Cruikshank and Cruikshank

Sausalito, CA · 94965

415-990-5783

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.