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 |
| 7160166 | Underwater flotation safety device An underwater flotation safety device includes a base that may be positioned below the water surface of a swimming pool with ballast, a hook, or the like. A buoyant member is releasably coupled to the base and is also positioned below the water surface. A release me... | 01/09/2007 |
| 5775226 | Underwater and land travel vehicle A pair of travel rails (46) each having an upper surface and a lower surface are laid to extend from on the land (44) into the water (45). Main tires (12) are rotatably disposed on opposite sides of a vehicle body (1), so that they are located between the... | 07/07/1998 |
| 4805549 | Device for subsea operations A device for carrying out works under water includes a twin hull submarine (1,2) which can be combined with a number of specially adapted cargo modules (12), in which the twin hull submarine between its two hulls (1,2) is provided with a cargo holder (15)... | 02/21/1989 |