IP Library
Patent Attorney

Charles S Duan

Reg. No. 65114
Active
Not accepting new clients
Firm
Public Knowledge
Location
Washington, DC 20036
Phone
202-861-0020
Registration Type
ATTORNEY
Roster
USPTO OED FY25
Search their patent cases → All cases at Public Knowledge
Firm and contact info reflects the FY25 roster (last updated September 25). Attorneys may have changed firms since then — patent filings show their current firm of record.