VD

Virgil D. Duncan

DR Digital Recorders: 3 patents #1 of 8Top 15%
Overall (All Time): #1,659,302 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
D340681 Solar powered broadcast trailer John R. Alpiser, Joanne D. Alpiser, Tanya L. Johnson 1993-10-26
4963866 Multi channel digital random access recorder-player 1990-10-16
4772873 Digital electronic recorder/player 1988-09-20