DP

Donald O. Parker

CM Coin Mechanisms: 1 patents #4 of 7Top 60%
📍 Grand Rapids, MI: #178 of 1,824 inventorsTop 10%
🗺 Michigan: #9,426 of 86,293 inventorsTop 15%
Overall (All Time): #527,364 of 4,157,543Top 15%
10
Patents All Time

Issued Patents All Time

Showing 1–10 of 10 patents

Patent #TitleCo-InventorsDate
5566808 Low profile coin analyzer apparatus Keith Parker 1996-10-22
5439089 Coin analyzer sensor configuration and system 1995-08-08
5293980 Coin analyzer sensor configuration and system 1994-03-15
5226520 Coin detector system 1993-07-13
5056644 Coin analyzer system and apparatus 1991-10-15
4926997 Apparatus and method for restarting a coin operated device after expiration of time 1990-05-22
4905814 Coil configuration for electronic coin tester and method of making Robert N. Rollins 1990-03-06
4884672 Coin analyzer system and apparatus 1989-12-05
4469213 Coin detector system Raymond Nicholson 1984-09-04
4437558 Coin detector apparatus Raymond Nicholson 1984-03-20