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 Morgan Lewis & Bockius LLP, Daylight Law, P.C., and Umberg/Zipser LLP.

Top cities in California

All practitioners in California

Tamiz R Khan

Reg. 46273

Patent attorney

Oakland, CA · 94610

415-596-2566

Waheed U Khan

Reg. 65574

Patent attorney

Daylight Law, P.C.

Palo Alto, CA · 94306

512-470-7081

Nasser B. Khateeb

Reg. 83775

Patent agent

Umberg/Zipser LLP

Irvine, CA · 92614

949-679-0052

Ilja V. Khavrutskii

Reg. 84188

Patent attorney

Knobbe, Martens, Olson & Bear, LLP

Irvine, CA · 92614

949-760-0404

Georgiy Khayet

Reg. 59595

Patent attorney

IP Jurists PC

Irvine, CA · 92618

650-646-4020

Vladimir Khiterer

Reg. 46168

Patent attorney

Khiterer Law Office

Newport Beach, CA · 92663

949-631-6161

Aida Khodadad

Reg. 78951

Patent agent

Mercedes Benz Research and Development

Sunnyvale, CA · 94085

480-737-1990

Audrey L. Khoo

Reg. 66366

Patent attorney

Chang & Cot?, LLP

City of Industry, CA · 91748

626-854-2112

Denis Khoo

Reg. 53117

Patent agent

Arcadia, CA · 91007

626-644-5466

Abhay Khosla

Reg. 59825

Patent agent

Sherman & Nathanson

Beverly Hills, CA · 90212

310-246-0321

Arman Khosraviani

Reg. 63270

Patent agent

Ascent Horizon LLC

Irvine, CA · 92614

408-728-5120

Afif G Khoury

Reg. 53118

Patent attorney

Wilson Sonsini Goodrich and Rosati

Palo Alto, CA · 94304

650-493-9300

Andrew N. Khouzam

Reg. 69092

Patent attorney

Frost Brown Todd LLP

San Francisco, CA · 94104

415-857-8309

Daniel C. Kiang

Reg. 79631

Patent attorney

Knobbe Martens Olson & Bear, LLP

Irvine, CA · 92614

949-760-0404

Maritza D. Kidd

Reg. 81275

Patent attorney

Intuitive Surgical, Inc.

Sunnyvale, CA · 94086-5301

408-523-2100

Lynn J Kidder

Reg. 56107

Patent agent

Bozicevic, Field & Francis, L.L.P.

East Palo Alto, CA · 94303

650-327-3400

Jonathan A Kidney

Reg. 46195

Patent attorney

EE-Patent

Solana Beach, CA · 92075

703-845-8066

Dannie Rae Kiel

Reg. 83301

Patent agent

Morgan Lewis & Bockius LLP

Palo Alto, CA · 94304

650-843-7288

Cynthia A Kikugawa

Reg. 40678

Patent attorney

Menlo Park, CA · 94026-0375

Yeokyoung Kil

Reg. 800165

Limited recognition

Morgan Lewis & Bockius LLP

Palo Alto, CA · 94304

650-843-7511

April E Kilburn

Reg. 51876

Patent agent

University of California, San Diego

LaJolla, CA · 92093-0910

858-822-1858

Neil P Kilcoin

Reg. 47705

Patent agent

Guava Technologies, Inc.

Hayward, CA · 94545

510-576-1409

Thomas Daniel Kiley

Reg. 24910

Patent attorney

Hillsborough, CA · 94010

650-348-6974

Laurel A Kilgour

Reg. 69429

Patent attorney

Comar Molle LLP

San Francisco, CA · 94115

415-562-6790

Brandon M Kilian

Reg. 77817

Patent attorney

Law Offices of Brandon Kilan

La Grange, CA · 95329

209-404-5135

Adrian H Kim

Reg. 53121

Patent attorney

San Francisco, CA · 94131

415-642-4933

Allen H Kim

Reg. 69814

Patent attorney

McDermott Will & Emery LLP

Irvine, CA · 92614-2559

949-757-6065

Andrew T. Kim

Reg. 70203

Patent attorney

Sheppard, Mullin, Richter & Hampton LLP

Los Angeles, CA · 90071

213-617-4250

Anthony S H Kim

Reg. 67182

Patent attorney

Saildrone, Inc.

Alameda, CA · 94501

415-670-9700

Brian Y. Kim

Reg. 84653

Patent attorney

Latham & Watkins LLP

San Francisco, CA · 94111

415-395-8093

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.