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 UCI Office of Technology Alliances, Morrison and Foerster, LLP, and P&P Imports LLC.

Top cities in California

All practitioners in California

Casie A Kelly-Quintos

Reg. 60593

Patent agent

UCI Office of Technology Alliances

Irvine, CA · 92697-7700

949-824-2920

David K Kempe

Reg. 78701

Patent agent

Morrison and Foerster, LLP

Palo Alto, CA · 94304

918-728-9228

Casey H. Kempner

Reg. 74516

Patent attorney

P&P Imports LLC

Irvine, CA · 92614

650-488-8270

Mark R Kendrick

Reg. 48468

Patent agent

Kendrick Intellectual Property Law

Sherman Oaks, CA · 91403

818-905-3211

Karl Kenna

Reg. 45445

Patent agent

Tucker Ellis LLP

San Francisco, CA · 94105

415-617-2400

Bill Kennedy

Reg. 33407

Patent attorney

Bill Kennedy Patents

Half Moon Bay, CA · 94019

650-703-8074

Kimberly A. Kennedy

Reg. 82055

Patent attorney

Kobre & Kim LLP

San Francisco, CA · 94111

415-582-4800

Patrick Michael Kennedy

Reg. 77344

Patent attorney

Mozilla Corporation

San Mateo, CA · 94105

402-881-0492

Roger P Kennedy

Reg. 44823

Patent attorney

The Walt Disney Corp

Burbank, CA · 91521

818-560-2723

Ryan B Kennedy

Reg. 48590

Patent agent

Run8 Patent Group

San Francisco, CA · 94103

415-579-5520

Troy A Kennedy

Reg. 61492

Patent attorney

Costa Mesa, CA · 92626

646-522-4759

Julia Kennedy-Darling

Reg. 81877

Patent agent

Redwood City, CA · 94061

503-704-0070

Christopher W Kennerly

Reg. 40675

Patent attorney

Paul Hasting LLP

Palo Alto, CA · 94304

650-320-1800

Christopher J Kenney

Reg. 50619

Patent agent

Menlo Park, CA · 94025

650-854-8154

Frank W Kenniasty

Reg. 46823

Patent attorney

San Carlos, CA · 94070

240-581-4477

Evan Michael Kent

Reg. 30074

Patent attorney

Mitchell Silberberg and Knupp LLP

Los Angeles, CA · 90064

310-312-3111

Jonathan G Kepko

Reg. 70303

Patent attorney

Lewis Brisbois Bisgaard & Smith LLP

San Francisco, CA · 94104

415-438-6646

Lori L Kerber

Reg. 41113

Patent agent

Incyte, Corp.

Palo Alto, CA · 94304

650-845-4894

Kathleen M Kerekes

Reg. 51870

Patent attorney

Kerekes Law Corporation

Sacramento, CA · 95814

916-706-0271

Daniel Howard Kern

Reg. 36841

Patent attorney

Irvine, CA · 92618

949-677-7233

Sara N Kerrane

Reg. 62801

Patent attorney

K&L Gates LLP

Irvine, CA · 92614

949-253-0900

Cameron Kerrigan

Reg. 44826

Patent attorney

Squire Patton Boggs (US) LLP

Palo Alto, CA · 94304

415-954-0323

Charles A Kertell

Reg. 41891

Patent attorney

Lewis, Brisbois, Bisgaard & Smith, LLP

Costa Mesa, CA · 92626

714-966-3141

Mark J Kertz

Reg. 43711

Patent attorney

Medtronic plc

Irvine, CA · 92617

949-680-1313

Irving Keschner

Reg. 24547

Patent attorney

Irving Keschner

Torrance, CA · 90503

310-977-5852

Henrik Keshishian

Reg. 54623

Patent attorney

Knobbe Martens

Irvine, CA · 92614

858-707-4013

Milord A Keshishian

Reg. 43333

Patent attorney

Milord & Associates, P.C.

Los Angeles, CA · 90064

310-226-7878

Amanda M. Kesich

Reg. 70667

Patent attorney

Weaver Austin Villeneuve & Sampson

Oakland, CA · 94612-0250

510-663-1100

Jarom D Kesler

Reg. 57046

Patent attorney

Knobbe, Martens, Olson & Bear LLP

Irvine, CA · 92614

949-760-0404

John J Ketchum

Reg. 61932

Patent attorney

Arent Fox LLP

Los Angeles, CA · 90013

213-988-6683

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.