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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 |
| 4635847 | Field marker and method A field marker is disclosed for selectively dropping sections of rolled paper tissue to the ground surface to indicate the boundary of an area being treated with a liquid. The marker includes a device for mounting a tissue roll for rotation to facilitate ... | 01/13/1987 |
