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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 |
| 5343290 | Surface particle detection using heterodyne interferometer A heterodyne interferometer is combined with darkfield surface particle detection for improved surface particle detection sensitivity. The probe beam and the reference beam have different wavelengths. The reference beam may either be a real reference beam... | 08/30/1994 |
| 5294806 | Optical submicron aerosol particle detector A particle detector that determines the presence of particles in an enclosed volume includes a laser that directs an optical beam to a beam splitter that produces first and second beams. An optical system directs the first beam into the enclosed volume. A... | 03/15/1994 |
| 5192870 | Optical submicron aerosol particle detector A particle detector that determines the presence of particles in an enclosed volume includes a laser that directs a coherent optical beam to a beam splitter that produces first and second divergent beams. An optical system images the point of origin of th... | 03/09/1993 |
| 5158690 | Thermophoretic filtering of liquids A thermophoretic filter cell for the filtering of particles from a liquid is constructed in a particular manner so that the liquid introduced into the filter acts as the heat sink. The cell is designed so that the thermophoretic velocity of the particles ... | 10/27/1992 |
| 5133602 | Particle path determination system A bright-field, particle position determining optical system is disclosed that uses both phase shift and extinction signals to determine particle trajectories. In a first embodiment, a pair of orthogonally polarized beams are positioned along an axis that... | 07/28/1992 |
| 5061070 | Particulate inspection of fluids using interferometric light measurements A method and apparatus for monitoring process fluids used in the manufacture of semiconductor components and other microelectronic devices relies upon detection of the phase shift of a pair of optical energy beams encountering a bubble or particle in the ... | 10/29/1991 |
