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 |
| 4140972 | System for synchronizing synthesizers of communication systems Frequency synthesizers at first and second stations that communicate with each other via a transmission link having a constant propagation delay time are started and synchronized by transmitting a tone from the first station to the second station via the ... | 02/20/1979 |
| 4081747 | Remote control for communication apparatus A remote control arrangement for a communication system which transmits intelligence occurring within a band of frequencies fb between first and second remotely located stations is described. The remote control arrangement which is adapted to a... | 03/28/1978 |
| 4053717 | Cordless telephone A cordless telephone including a Touch-tone signal generator module including ten buttons for initiating the generation of telephone switching signals representing ten numeric characters and two additional buttons; one of which is used for switching the c... | 10/11/1977 |
| 4021756 | Electric remote control transmitter An electronic remote control transmitter employs a two transistor cascade oscillator having positive and negative feedback loops. The oscillator voltage is supplied through a switch assembly containing a plurality of momentary contact switches to a pair o... | 05/03/1977 |
| 3969675 | Single side-band radio A single side-band electrical information-transmission system is described in which the correct oscillator frequency for demodulation in the receiver is achieved by attenuating a narrow band of audio frequencies in the transmitter and automatically correc... | 07/13/1976 |
| 3955140 | Mobile radio extension unit with punch through operation A mobile radio extension unit for converting a conventional mobile transceiver having a transmitter and a receiver to use as a repeater or transponder for establishing a bidirectional communications link between a transceiver of limited range and a base s... | 05/04/1976 |
