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 BioMarin Pharmaceutical, Inc., Neurocrine Biosciences, lnc., and MDE Patents.

Top cities in California

All practitioners in California

Luisa Bigornia

Reg. 45974

Patent attorney

BioMarin Pharmaceutical, Inc.

Novato, CA · 94949

415-506-6700

Janis Biksa

Reg. 33648

Patent attorney

Santa Rosa, CA · 95405

650-888-6140

Natalie A. Bilci

Reg. 75097

Patent agent

Neurocrine Biosciences, lnc.

San Diego, CA · 91230

858-239-6841

Ahmed Imtiaz Billah

Reg. 75577

Patent agent

MDE Patents

Encinitas, CA · 92024

732-887-7420

Nathan A Billings

Reg. 70600

Patent agent

Creyon Bio, Inc.

San Diego, CA · 92121

617-299-9318

Michael F Bilotta

Reg. 53991

Patent agent

SoCal Engineering, Inc.

San Marcos, CA · 92069

858-442-7303

David L Bilsker

Reg. 39611

Patent attorney

Quinn Emanel Urquhart & Sulliavan, LLP

San Francisco, CA · 94111

415-875-6432

Pamela Bingcang

Reg. 69851

Patent attorney

Alpine Electronics of America, Inc.

Torrance, CA · 90501

310-783-7035

Douglas A Bingham

Reg. 32457

Patent attorney

Randro Santa Fe, CA · 92067

858-784-2937

Jonathan W Bingham

Reg. 62170

Patent agent

Waymo LLC

Mountain View, CA · 94043

310-754-9614

Marcel K Bingham

Reg. 42327

Patent attorney

HICKMAN PALERMO BECKER BINGHAM LLP

San Jose, CA · 95113

408-414-1206

Benjamin C. Bira

Reg. 79658

Patent agent

Glendale, CA · 91203

573-979-1946

Jesse D. Birbach

Reg. 71334

Patent attorney

Gunderson Dettmer

Redwood City, CA · 94063

650-463-5492

Jeffrey A Birchak

Reg. 46200

Patent attorney

Fallbrook Technologies, Inc.

San Diego, CA · 92101

858-623-9557

Nicola J Bird

Reg. 45478

Patent attorney

Irell and Manella, LLP

Los Angeles, CA · 90067

310-203-7004

Tyler J Bird

Reg. 79511

Patent attorney

Wilson Sonsini Goodrich & Rosati P.C.

Palo Alto, CA · 94304

415-947-2155

Herbert A Birenbaum

Reg. 24463

Patent attorney

Herbert A Birenbaum

Santa Monica, CA · 90402-1664

310-393-3827

Erik J Birkeneder

Reg. 65299

Patent attorney

Neumora Therapeutics

Brisbane, CA · 94005

310-962-3183

Jon A Birmingham

Reg. 51222

Patent agent

Fitch, Even, Tabin & Flannery, LLP

Woodland Hills, CA · 91367

818-715-7025

Cassidy H Birtley

Reg. 67557

Patent attorney

TaylorMade Golf Company

Carlsbad, CA · 92008

760-918-1466

Gregory S Bishop

Reg. 41621

Patent attorney

Pepper Hamilton LLC

Redwood City, CA · 94065-1434

650-802-3601

Laura Haburay Bishop

Reg. 47424

Patent attorney

McKinleyville, CA · 95519-2294

661-714-3940

Claire E. Bispo

Reg. 84084

Patent agent

Morgan Lewis & Bockius LLP

San Francisco, CA · 94111

415-442-1000

Barry A Bisson

Reg. 20122

Patent attorney

Huntington Beach, CA · 92646

714-964-0445

Shouvik Biswas

Reg. 68439

Patent attorney

Kubota & Basol LLP

Los Angeles, CA · 90071

213-297-1424

Caroleen Bassam Bitar

Reg. 903204

Limited recognition

Loyola Law School

Los Angeles, CA · 90015

818-359-4553

Donald W Bivens

Reg. 42330

Patent attorney

Musick Peeler Garrett, LLP

San Diego, CA · 92101

619-525-2500

Galya D Blachman

Reg. 69828

Patent attorney

South San Francisco, CA · 94080

415-828-4517

Bradford J Black

Reg. 72860

Patent attorney

Bradford Black P.C.

San Francisco, CA · 94111

415-813-6211

Jeremy Black

Reg. 48129

Patent agent

Tustin, CA · 92781

949-413-6541

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.