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 Bond Law, Genentech, Inc., and Robbins Geller Rudman & Dowd, LLP.

Top cities in California

All practitioners in California

Katherine M Bond

Reg. 66381

Patent attorney

Bond Law

Mission Viejo, CA · 92690-2462

619-807-3222

Richard G. A. Bone

Reg. 56637

Patent attorney

Genentech, Inc.

South San Francisco, CA · 94080

650-866-6296

Michele J. Bongiovanni

Reg. 75664

Patent attorney

Robbins Geller Rudman & Dowd, LLP

San Diego, CA · 92101

619-231-1058

Celine M. Bonnefous

Reg. 72875

Patent agent

Wilson Sonsini Goodrich Rosati

San Diego, CA · 92130

858-350-2213

Cynthia A Bonner

Reg. 44548

Patent attorney

Applied Medical Resources Corporation

Rancho Santa Margarita, CA · 92688

949-713-8000

Loyd W Bonneville

Reg. 35453

Patent attorney

Air Force Village West

Riverside, CA · 92518

951-567-5311

Christopher M Bonny

Reg. 63307

Patent attorney

Ropes Gray LLP

East Palo Alto, CA · 94303-2284

650-617-4011

Michelle A Booden

Reg. 55013

Patent agent

Salk Institute for Biological Sciences

La Jolla, CA · 92037

858-453-4100 X1612

David A Boone

Reg. 27613

Patent attorney

Law Offices Of David A Boone

San Jose, CA · 95126

408-291-6000

Laural Sabrina Boone

Reg. 43505

Patent attorney

Neurocrine Biosciences, lnc.

San Diego, CA · 92130

858-500-9970

Navin R Bora

Reg. 72377

Patent attorney

Rhema Law Group

Irvine, CA · 92614

949-852-4430

Paul E Borchardt

Reg. 53999

Patent attorney

FibroGen, Inc.

San Francisco, CA · 94158

415-978-1748

Paula A Borden

Reg. 42344

Patent agent

Bozicevic Field & Francis, LLP

Redwood City, CA · 94065

650-327-3400

Nina Habib Borders

Reg. 55237

Patent attorney

Reed Smith LLP

Palo Alto, CA · 94304

650-352-0627

Alan D. Borelli

Reg. 79372

Patent attorney

San Leandro, CA · 94577

510-219-1706

Andrew J. Borja

Reg. 75332

Patent agent

Power Integrations

San Jose, CA · 95138

408-414-9200

Martin L Bormolini

Reg. 74142

Patent agent

Oakland, CA · 94612

510-325-9154

Roger S Borovoy

Reg. 20193

Patent attorney

Los Altos, CA · 94024

650-967-7596

Aaron T Borrowman

Reg. 42348

Patent attorney

Kelly, Lowry & Kelley LLP

Woodland Hills, CA · 91367

818-347-7900

Daniel Benjamin Borson

Reg. 42349

Patent attorney

Borson Law Group, PC

Lafayette, CA · 94945-4760

925-310-2060

James A. Borthwick

Reg. 74861

Patent agent

Santa Clara, CA · 95050

408-799-7305

Scott R Bortner

Reg. 34298

Patent attorney

Guardant Health

Redwood City, CA · 94063

650-383-7237

Timothy J. Bortree

Reg. 43506

Patent attorney

Rancho Santa Fe, CA · 92067

908-745-8221

Austin G Bosarge

Reg. 52639

Patent attorney

Turning Point Law

Petaluma, CA · 94954

415-492-2041

Colin Michael Bosch

Reg. 77457

Patent attorney

Wilson Sonsini Goodrich & Rosati

San Diego, CA · 92130

469-831-0420

Subroto Bose

Reg. 55014

Patent attorney

Innovium, Inc.

San Jose, CA · 95002

415-269-5880

Adam A Boskovic

Reg. 56659

Patent agent

Oakland, CA · 94611

415-730-5463

Brandon Boss

Reg. 46567

Patent attorney

Gilead Sciences, Inc.

Foster City, CA · 94404

650-522-4626

Brock N. Boss

Reg. 66044

Patent agent

San Francisco, CA · 94124

202-713-9559

Randall R Boss

Reg. 55015

Patent agent

Staco Systems

Long Beach, CA · 90804

562-304-6802

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.