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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 |
| 4744180 | Sanding wheel A sanding wheel is provided having easily removable and replaceable contoured abrasive strips enabling use of the sanding wheel to sand workpieces of different contours accurately without replacement of the complete sanding wheel.... | 05/17/1988 |
