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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 |
| 5528232 | Method and apparatus for locating items A communication system that communicates for locating one or more tags in a time and energy efficient manner. The tags are positioned in a communication region and are located by a locator. The tags are located through organized transmission and reception... | 06/18/1996 |
| 5199183 | Method and apparatus for measuring rise in height of a liquid column An electrode is lowered toward the surface of a liquid column until electrical contact is made between the electrode and a liquid column to establish current flow between the electrode and the liquid column. The electrode is raised from the liquid column.... | 04/06/1993 |
| 5115574 | Method and apparatus for measuring rise in height of a liquid column Electrical contact is made between an electrode and a liquid column to establish current flow between the electrode and the liquid column. The electrode is raised up the liquid column until electrical contact is broken. An additional quantity of liquid is... | 05/26/1992 |
| 4014102 | Method of and an apparatus for measuring the electrode length in an electric furnace The electrode length in an electric furnace is measured by arranging a wire conductor to depend right above a hollow electrode such that it can be lowered and raised through the hollow electrode. When the wire conductor is lowered through the hollow elect... | 03/29/1977 |
