Quotables
"The wireless music box has no imaginable commercial value. Who would pay for a message sent to nobody in particular?"
David Sarnoff, American radio pioneer ; 1921
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| Number | Title | Issue Date |
| 7272901 | Display arrangement A display arrangement 10 made of card with a pair of windows 18. A movable carrying member 30 is provided bearing two images 30 selectively viewable through the respective windows 18. The arrangement 10 is configured such th... | 09/25/2007 |
| 6585520 | Method and system for enhancing memorization by using a mnemonic display A method and system is disclosed for enhancing a memorization process by using a mnemonic display implemented with a grid learning system. First, the grid learning system is implemented on a predetermined display area of a display device with a plurality ... | 07/01/2003 |
| 5988684 | Mechanized and motorized books with internal mechanism for selectively moving objects relative to book pages Books with internal mechanization have rotary and linear drive mechanisms which displace objects along linear, non-linear, rotary and three-dimensional paths relative to the book pages are described. Spatially arranged cut-outs in the pages which correspo... | 11/23/1999 |
| 5906491 | Geography teaching apparatus A geography teaching apparatus has two working surfaces, such as on opposing sides of a substrate such as paper. The first working surface contains graphical images representing the outlines of countries, such as in a map of a continent. The second or opp... | 05/25/1999 |
| 5362054 | Multi-layered educational and entertaining device including a plurality of independent layers A multi-layered educational and entertaining device including a plurality of independent layers, comprising a top planar layer comprising a plurality of irregularly-shaped pieces assembled together to form a top educational and entertaining picture, at le... | 11/08/1994 |
| 5178542 | Learning aid A learning aid is disclosed which has particular benefit in the teaching and learning of a foreign language. To allow the reader to become accustomed to full phrase translation, as opposed to word-by-word translation, text and associated graphics are prov... | 01/12/1993 |
| 5117569 | Greeting card The specification discloses a new and improved greeting card comprising a first translucent panel having indicia thereon and a second panel connected to the first panel and with an opening which defines an image thereon. The translucency of the first pane... | 06/02/1992 |
| 5110295 | Educational tracing device An educational training device in which a plurality of transparent sheets and base sheets are secured in fixed registry onto a top surface of a frame. A student can trace patterns shown on the base sheets onto the transparent sheets. The student can also ... | 05/05/1992 |
| 4652014 | Rapid, low cost information retrieval apparatus Low cost, easily updated information retrieval apparatus is provided that will provide rapid access to information relating to the probable cause of an apparent or actual process or other machine malfunction signalled by an indicating device, and a recomm... | 03/24/1987 |
| 4371345 | Multi-dimensional display equipment Display equipment gives a representation of a three-dimensional body. A series of spaced apart panels (28) are mounted to a support structure (30). Each panel (28) carries representations (40) of parts of the three-dimensional body which occur in the plan... | 02/01/1983 |
| 4315320 | Educational analog computer laboratory This invention relates to a book-sized, self-contained analog computer, organized to enable an inexperienced person to program readily a differential equation. In this computer permanent circuits are either exposed or indicated as solid lines. Connections... | 02/09/1982 |
| 4231168 | Instrument panel teaching aid A teaching aid for use with equipment having an instrument panel provided with at least one of operating elements and diagnostic instruments. The teaching aid includes one or more charts which are removable in a predetermined sequence in steps from the in... | 11/04/1980 |
