RD

Robert R. Diekhoff

DA Datakey: 1 patents #4 of 6Top 70%
DS Duncan Industries Parking Control Systems: 1 patents #5 of 11Top 50%
QO Qonaar: 1 patents #1 of 10Top 10%
📍 Harrison, AR: #14 of 59 inventorsTop 25%
🗺 Arkansas: #1,791 of 5,804 inventorsTop 35%
Overall (All Time): #2,279,504 of 4,157,543Top 55%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5526662 Cashless key and receptacle system Joseph H. Sutton, Hazem Hassan, Michael Boehner 1996-06-18
4729509 Coin collecting apparatus — 1988-03-08