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Reward Candy Dispenser for Personal Computers
A personal computer peripheral, battery powered reward candy dispenser which immediately presents students with a single candy for each problem completed correctly.
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| Number | Title | Issue Date |
| 4856554 | Vacuum check valve and method of control A high flow vacuum check valve incorporates a plurality of rubber dampening feet located on the sealing bead side of the valve poppet. The feet extend axially slightly beyond the sealing surface of the sealing bead so as to have an axial compression inter... | 08/15/1989 |
| 4724867 | Vacuum check valve Resilient side loading of vacuum brake booster check valves to inhibit valve pulsations and resulting valve noises generated by pulsations from the vacuum source.... | 02/16/1988 |
