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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 |
| 7180690 | Light condensing filter A light condensing filter has plural prisms formed on a surface of a flat substrate and on the opposite surface to the surface, and light from a light source is condensed by the plural prisms, wherein the plural prisms formed on the surface are designed in a linear ... | 02/20/2007 |
| 7147903 | High efficiency optical devices Optical devices such as backlight assemblies, according to the present invention include a multilayer optical film in which at least one of the layers comprises an oriented birefringent polymer. The multilayer optical film exhibits low absorptivity and can reflect l... | 12/12/2006 |
| 7057821 | Integrated artificial and natural lighting system An artificial and natural lighting system placed in the roof of a building that is substantially self-contained and powered. A photovoltaic cell provides electricity stored in a battery to power light emitting diodes. A highly reflective interior coating applied to ... | 06/06/2006 |
| 7035014 | Device for collimating light emanating from a laser light source and beam transformer for said arrangement A device for collimating light emanating from a laser light source, including a laser light source with a plurality of substantially linear emission sources arranged next to each other in at least one row, and collimation means with a plurality of collimation elemen... | 04/25/2006 |
| 6924014 | High efficiency optical devices Optical devices according to the present invention include a multilayer optical film in which at least one of the layers comprises an oriented birefringent polymer. The multilayer optical film exhibits low absorptivity and can reflect light approaching at shallow an... | 08/02/2005 |
| 6212009 | Phase annulus to carry out a positive phase contrast The invention relates to a phase annulus consisting of a phase shifting thin-film system, which, in the case of a cemented system, has the following structure: (first) substrate-Ag-nH -cement-(second) substrate, or a structure: (first) substrat... | 04/03/2001 |
| 6078426 | Light diffuser with macroscopic chaotically and quasichaotically formed light reflecting and light refracting planes A light diffuser includes a light scattering element particularly useful for ornamental and decorative purposes. The light scattering element has macroscopic chaotically or quasi-chaotically formed refracting planes and/or reflection planes. The light sca... | 06/20/2000 |
| 6075581 | Liquid crystal display device including a birefringent filter and a diffractive filter for diffusing the resultant image An image display apparatus and a liquid-crystal display device using such an optical filter for diffusing pixels while suppressing the occurrence of moire. A diffuser (optical filter) 13 comprising a combination of a diffraction grating 26 and a birefring... | 06/13/2000 |
| 6030687 | Vision control panels for displaying discrete images observable from one side of the panel and method of making A retroreflective vision control panel which includes an opaque sheet material coated with retroreflective light reflecting particles and a dark opaque color on the reverse side thereof, and an image formed over top the retroreflective particles using col... | 02/29/2000 |
| 5939168 | Vision control panel for displaying discrete images observable from one side of the panel and method of making A retroreflective vision control panel which includes an opaque sheet material coated with retroreflective light reflecting particles and a dark opaque color on the reverse side thereof, and an image formed over top the retroreflective particles using col... | 08/17/1999 |
| 5880886 | Optical component suitable for use in glazing An optical component comprises at least one substantially planar element having a plurality of elementary surfaces capable of acting to reflect by total internal reflection light incident thereon through the corresponding said element within a first range... | 03/09/1999 |
| 5773110 | Window painting apparatus and method An improved display product and method of making a display wherein a perforated panel is provided with layers of paint which are kept on the panel. Thus, a sign painter can have a wide latitude of designs which can be applied to see-through graphics. The ... | 06/30/1998 |
| 5679435 | Vision control panels with perforations and method of making A retro-reflective vision control panel which includes an opaque sheet material coated with retro-reflective light reflecting particles and a dark opaque color on the reverse side thereof, and an image formed over top the retro-reflective particles using ... | 10/21/1997 |
| 5609938 | Image display apparatus with holes for opposite side viewing One or more panels define a support for an image layer and a relatively dark layer. Holes extend through the panel and the layer. The holes allow viewing through the panels in one direction without seeing the image, yet the image can be viewed by looking ... | 03/11/1997 |
| 5198922 | Specularly transmitting and diffuse reflecting optical shutter A diffuse reflecting and specularly transmitting optical shutter structure comprises an optically rough layer of an optically thin optical shutter, and two additional layers disposed on either side of the optical shutter. These two additional layers have ... | 03/30/1993 |
| 4673609 | Unidirectional panel A panel which comprises a substrate of transparent or translucent material having applied to one or both sides a design superimposed on, or forming part of, an opaque pattern so that the design on one side of the panel cannot be seen from the other side.... | 06/16/1987 |
| 4351588 | Process and means for controlling the radiant energies of the entire spectral range in rooms Using windows with reflectors and roof elements with a triangular pyramidal structure, the natural sun rays of the entire spectral range from infra-red to ultra-violet are spread at least in a major part of the room in a controlled diffuse manner. Local e... | 09/28/1982 |
