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| Number | Title | Issue Date |
| 7079778 | Rugged shock-resistant backplane for embedded systems Infrared communications scheme for use in an embedded system. According to a preferred embodiment, the invention comprises the use of an infrared communications scheme, according to IrDA protocol, which is utilized to transmit and receive data optically between circ... | 07/18/2006 |
| 7040898 | Computer software and portable memory for an electronic educational toy Computer software and portable memory for an electronic educational toy designed to stimulate the development of a child's mind using audio feedback, the educational toy including an enclosure enclosing a processor, data storage medium and a speaker and having a sub... | 05/09/2006 |
| 7029283 | Electronic educational toy An electronic educational toy having a housing for teaching children comprising a toy housing supporting a substantially planar work platform on which a child can make selections by causing contact with the work platform and enclosing a speaker, a processor, and a s... | 04/18/2006 |
| 6937080 | Current-controlled CMOS logic family Various circuit techniques for implementing ultra high speed circuits use current-controlled CMOS (C3MOS) logic fabricated in conventional CMOS process technology. An entire family of logic elements including inverter/buffers, level shifters, NAND, NOR, X... | 08/30/2005 |
| 6357940 | Configurable keyguard for use with touch sensitive keyboard A configurable touch sensitive keyboard system is used to adjust or control the interface to a computer or other electronic device, particularly, for disabled individuals. The configurable touch sensitive keyboard system includes a touch sensitive keyboar... | 03/19/2002 |
| 5864490 | Retractable electronic pen pad assembly for a keyboard A retractable electronic pen pad for a keypad is provided including a keyboard having a plurality of alphanumeric keys adapted to generate character signals upon the depression thereof. Further included is a sliding bracket coupled to a bottom face of the... | 01/26/1999 |
| 5526294 | Capacitive touch entry apparatus using drive pulse signals of different phases A key input device includes first and second key input electrodes being close to each other and being accessible by a finger of an operator. First and second signal input electrodes oppose the first and second key input electrodes respectively. A first si... | 06/11/1996 |
| 5134692 | Combined electronic calculator and abacus with deflective guide bars An electronic calculator is provided with an abacus and has both advantages of the calculator and abacus. An abacus and a portable electronic calculator are integrally constituted in such a manner as superimposing each other. Thus, the calculator accordin... | 07/28/1992 |
| 4545023 | Hand-held computer The invention relates to a hand-held computer comprising a peripheral frame which contains all the connections and in which cards are removably plugged. A flat display, mounted on said frame, is topped by a transparent plate which forms a matrix of touch-... | 10/01/1985 |
| 4370727 | Pocket calculator for family planning including a thermometric probe The present invention is intended to solve the problem of the reliable acquisition of accurate temperature data for a miniature calculator provided for the application of family planning methods. The calculator is provided with a receptacle removably carr... | 01/25/1983 |
| 4093992 | Electronic wristwatch An electronic wristwatch having calculator circuitry operated by the time standard signals utilized to operate the timekeeping circuitry is provided. The electronic wristwatch includes a timing pulse generating circuit for producing a plurality of signals... | 06/06/1978 |
| 4075702 | Electronic calculating apparatus and wallet enclosure Several embodiments of an electronic calculating apparatus and wallet enclosure are described. The apparatus is provided with a side-located battery compartment for providing, in combination with the enclosure, a very convenient and useful, relatively thi... | 02/21/1978 |
| 4069659 | Electronic switch activated by current flow through the human body An electronic circuit having two states, at least one of which is stable and which permits information to pass from one terminal to the other. The circuit can be activated by the flow of a minute electric current through the human body. The circuit is par... | 01/24/1978 |
| 4055755 | Switching assembly in combination wristwatch and calculator In a combination wristwatch and calculator, a key input means for information entry employs a touch sensitive electronic switching circuitry comprising a C-MOS inverter. One electrode for the touch sensitive electronic switching circuitry is provided on t... | 10/25/1977 |
| 4047010 | Multi-functional electronic watch A multifunctional wrist watch combining the functions of time-indication with other functions, for example a calculator. The watch has a glass in which pick-ups are provided for detecting the passage of a finger of a user over the surface of the glass and... | 09/06/1977 |
| 3963906 | Compact electronic calculator A compact electronic calculator having an input circuit defined by a plurality of lead switches mounted beneath an operative surface for selective actuation by a manually manipulatable permanent magnet. The calculator further includes a calculating circui... | 06/15/1976 |
