Patent Attorney
Donald J Verplancken
Reg. No. 33217
Active
Not accepting new clients
Firm
Patterson & Sheridan, LLP
Patterson & Sheridan, LLP
Location
Houston, TX 77056
Houston, TX 77056
Phone
713-576-5020
713-576-5020
Registration Type
ATTORNEY
ATTORNEY
Roster
USPTO OED FY25
USPTO OED FY25
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.