Registered patent attorney
David S Barnhill
Firm
Chang & Hale LLP
Address
4199 Campus Drive
Suite 550
Irvine, CA, 92612
US
Phone
Registered as
Registered patent attorney
Other attorneys at Chang & Hale LLP
Other patent attorneys in Irvine, California
- Eric L. AbadaKnobbe, Martens, Olson & Bear, LLP
- Lannah S. AbasiK&L Gates LLP
- Tina Marie AbernethyLaw Office of Tina M. Abernethy
- Saul AchermanJafari Law Group, Inc.
- Jessica L AchtsamKnobbe Martens Olson & Bear LLP
- William O. AdamsKnobbe, Martens, Olson & Bear LLP
- Micha AdlerProcopio, Cory, Hargreaves & Savitch
- Erik M. AhroonAcacia Research Group LLC
Frequently asked
Frequently asked about David S Barnhill
Is David S Barnhill a registered patent attorney?
Yes. David S Barnhill is a registered patent attorney with the United States Patent and Trademark Office (USPTO Registration Number 72376). Registration is verified against the USPTO Office of Enrollment and Discipline roster.
Where is David S Barnhill located?
David S Barnhill's office is in Irvine, California (92612). Affiliated with Chang & Hale LLP.
What firm does David S Barnhill work at?
David S Barnhill is listed as affiliated with Chang & Hale LLP on the USPTO Office of Enrollment and Discipline practitioner roster.
How do I contact David S Barnhill?
David S Barnhill's office phone (per the USPTO public roster) is 949-336-1454. 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.