Did You Know...
...that the Slinky toy was the result of a failed attempt by engineer Richard James to produce an antivibration device for ship instruments? His goal was to develop a spring that would instantaneously counterbalance the wave motion that rocks a ship at sea. Instead, he developed the Slinky.
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| Number | Title | Issue Date |
| 5134716 | Point of sale audio-visual advertising system A point of sale audio-visual advertising system is disclosed which has a central station and a plurality of outstations. The central station is generally located in a shop attached to service or filling stations which sell petroleum products such as gasol... | 07/28/1992 |
| 5109534 | Cable communication system with transmission line incorporated in hose An improvement is attained in a cable communication system of the type having communication line incorporated in the interior of a water supply hose which comprises, in combination, signal transmission cable incorporated extending in the interior of the w... | 04/28/1992 |
| 5095537 | Automatic monitoring system in an explosive environment of a direct current source by storage batteries An automatic monitoring system of storage batteries housed in battery rooms comprises an acquisition satellite associated with a sensor to measure various physical parameters representative of the operating state of a pilot battery cell, notably the densi... | 03/10/1992 |
| 5090030 | Integral lap counter for radio-controlled models A method and apparatus for counting the laps completed by a remote-controlled model that detects a spurious radio-frequency electromagnetic signal spontaneously generated by the unmodified model. Presently, each model must carry on-board lap-counting sign... | 02/18/1992 |
| 5063610 | Broadcasting system with supplemental data transmission and storage A technique for broadcasting program material together with encoded items of information pertaining to the program material such as the title of a broadcast musical piece, the artist name, catalog number, and the like. A number of sources of recorded prog... | 11/05/1991 |
| 5052048 | Crime deterrent system The invention relates to a crime deterrent system in which passive pursuit of a randomly moving subject involved in a crime is monitored by a central control station having input as to the exact location and direction of movement of the subject from at le... | 09/24/1991 |
| 5023931 | Television local wireless transmission and control A wireless local television transmission system with related methods, apparatus, and components. There is a source of a video signal to be viewed at a remote location such as a TV camera, cable select box, antenna, or VCR. An up converter is connected to ... | 06/11/1991 |
| 5012350 | Television local wireless transmission and control A wireless local television transmission system with related methods, apparatus, and components. There is a source of a video signal to be viewed at a remote location such as a TV camera, cable select box, antenna, or VCR. An up converter is connected to ... | 04/30/1991 |
| 4936037 | Pistol with concealed radio transmitter A Browning high power pistol with a concealed radio transmitter. The wood side pieces on the hollow gun handle are recessed to hold a microphone and radio transmitter circuitry in one side piece and an antenna, including its ground plane, in the other. Th... | 06/26/1990 |
| 4916532 | Television local wireless transmission and control A wireless local television transmission system with related methods, apparatus, and components. There is a source of a video signal to be viewed at a remote location such as a TV camera, cable select box, antenna, or VCR. An up converter is connected to ... | 04/10/1990 |
| 4313208 | Methods and apparatus for transmitting electromagnetic radiation for illumination and communication Methods and apparatus for transmitting electromagnetic radiation in a space for illumination and communication provide in that space a gas discharge lamp, a first antenna for emitting radio frequency signals and a second antenna for receiving such emitted... | 01/26/1982 |
| 4207598 | Automatic mail sending system For sending mail automatically, letters put in a sending station uncovered are scanned with a television camera tube, and the information is transmitted to storages in a telephone exchange. In the exchange, a numerical destination address written at a spe... | 06/10/1980 |
| 4197497 | Automatic police emergency locator system All messages broadcast through a two-way radio by a police officer from his vehicle, are recorded on an endless tape loop of a playback recorder. An alerting signal generated by a pretuned oscillator is simultaneously recorded on the tape with each messag... | 04/08/1980 |
| 4124815 | Radio and/or telephone communication system for a fleet of vehicles In a fleet of vehicles, all the vehicles are provided with permanently installed antennas, cable connections, control unit mounts, and transmitter-receiver mounts. Transmitter-receivers and control units, less in number than the number of vehicles in the ... | 11/07/1978 |
| 4107611 | Police protection method and apparatus This is a method and apparatus for performing such method to provide protection to police officers during the interviewing of witnesses and the investigation of matters, such protection being concerned with protection against false charges of police bruta... | 08/15/1978 |
| 4106060 | Electronic mail box An electronic mail box includes an entry slot for receiving a letter to be transmitted electronically to a remote point, an optical reader for converting the letter text to electronic signals, and a keyboard for receiving the address of the addressee. The... | 08/08/1978 |
| 3991369 | Cartridge-type radio-communication device A cartridge system for use with a conventional cartridge-type tape reproducer. The cartridge system provides radio transmitting and receiving circuits, connections to a microphone and an antenna, and power connections to convert the tape reproducer into t... | 11/09/1976 |
| 3961259 | Marine smoke markers In a buoyant smoke marker for marine use, the provision of a radio transmitter. The marker can be located from much greater distances than can conventional smoke markers.... | 06/01/1976 |
