Registered patent attorney
David R. Trossen
Firm
Knobbe Martens Olson & Bear, LLP
Address
333 Bush Street, 21st Floor
San Francisco, CA, 94104-4448
US
Phone
Registered as
Registered patent attorney
Other attorneys at Knobbe Martens Olson & Bear, LLP
- Kazuo AokiUSPTO Reg. 60618 · Irvine, CA
- Jonathan E BachandUSPTO Reg. 67884 · Irvine, CA
- Vikas BhargavaUSPTO Reg. 68005 · Irvine, CA
- Michael P BurnsUSPTO Reg. 64664 · Irvine, CA
- Jeremy J. CarneyUSPTO Reg. 75717 · Irvine, CA
- Andrea L CheekUSPTO Reg. 65642 · Washington, DC
- Po-An ChenUSPTO Reg. 84178 · Irvine, CA
- Amy C ChunUSPTO Reg. 52742 · Irvine, CA
Other patent attorneys in San Francisco, California
- Evan K AbbaszadehUSPTO Reg. 77455
- Tom AbelesEvolve Discovery
- Michael J AdamsSquire Patton Boggs
- Bonnie M AdellZendesk, Inc.
- Michael T AdelsheimTucker Ellis, LLP
- Matthew Allan AdrianowyczWilson Sonsini Goodrich & Rosati
- Anchal AgarwalAlston & Bird LLP
- Juwon AhnCovington & Burling LLP
Frequently asked
Frequently asked about David R. Trossen
Is David R. Trossen a registered patent attorney?
Yes. David R. Trossen is a registered patent attorney with the United States Patent and Trademark Office (USPTO Registration Number 59406). Registration is verified against the USPTO Office of Enrollment and Discipline roster.
Where is David R. Trossen located?
David R. Trossen's office is in San Francisco, California (94104-4448). Affiliated with Knobbe Martens Olson & Bear, LLP.
What firm does David R. Trossen work at?
David R. Trossen is listed as affiliated with Knobbe Martens Olson & Bear, LLP on the USPTO Office of Enrollment and Discipline practitioner roster.
How do I contact David R. Trossen?
David R. Trossen's office phone (per the USPTO public roster) is 415-954-4114. Verify availability and intake details directly with the firm before sending privileged materials.
Should I prepare anything before contacting a patent attorney?
Yes — most patent attorneys quote based on a brief. Persoona's intellectual property module generates a prior-art analysis, defensibility scorecard, and a draft USPTO filing package so you arrive with a brief, not a blank slate. Free to run.
Profile sourced from the USPTO OEDCI Practitioner Roster. Persoona did not provide, edit, or curate this data — every field is pulled directly from the public roster.