Walnut, California
Patent attorneys in Walnut
Walnut, California is home to 8 USPTO-registered patent practitioners. Working with a local practitioner can streamline in-person meetings for invention disclosures, signing inventor declarations, and reviewing prior-art search results — but every USPTO practitioner is licensed to practice nationally, so a non-local choice is also valid.
Austin T Cairns
Reg. 75991Patent agent
Walnut, CA · 91789
657-231-2070
Eric W. Chang
Reg. 76511Patent agent
Walnut, CA · 91789
909-576-3023
Mandana Jafarinejad
Reg. 67974Patent attorney
Walnut, CA · 91789
626-379-5490
Billy Y Lau
Reg. 40248Patent agent
Walnut, CA · 91789
626-922-5500
Michael A Lucero
Reg. 80683Patent agent
Walnut, CA · 91789
909-706-5168
David Sangchoon Park
Reg. 52094Patent attorney
Walnut, CA · 91789
Mei Lin Wong
Reg. 66408Patent agent
Walnut, CA · 91789
626-478-8116
Hsueh-Li Yang
Reg. 77978Patent agent
Walnut, CA · 91788
909-530-9220
Common questions
Do patent attorneys in Walnut cost more than the national average?
Patent attorney fees vary primarily by experience and complexity of the invention, not by city. A typical provisional patent application in the US runs $1,500 to $5,000; a non-provisional utility filing runs $5,000 to $15,000. Hourly rates in Walnut tend to track the broader California legal market.
How many USPTO practitioners list a Walnut office?
8 USPTO-registered patent practitioners list a Walnut mailing address on the OEDCI roster. You can sort by firm size and contact each directly using the phone numbers shown.
Can I work with a Walnut practitioner remotely?
Yes. All filings happen through USPTO's electronic Patent Center — no in-person presence is required. A Walnut-based practitioner is convenient for local inventor signings and in-person meetings but not a requirement for representation.