Matches 1 - 13 out of 13
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7069042 Quadrature direct synthesis discrete time multi-tone generator  
A tone generator in a transceiver of a communications device may generate an arbitrary signal using two shift registers to generate the time intervals. During each time interval, a different...
6021119 Multiple site interactive response system  
An interactive response system includes a central control host system and one or more wireless remote systems geographically separated from the host system and interconnected with the host system...
5749050 Automatic emergency alarm reception apparatus using specific frequency  
An automatic emergency alarm reception apparatus for a broadcasting receiver which has a radio frequency part and a low frequency part, comprising an ON/OFF switch connected between the radio...
5724357 Remote response system and data transfer protocol  
A wireless remote response system includes a base unit which retrieves user-entered responses from a plurality of remote response units, each of which is provided to a user. The base unit transmits...
EP0782355A2 Selective reception of a radio signal in a cell assigned with one of several predetermined bit rates and one of several predetermined signal formats  
In a selectively called radio receiver operable with battery saving and including a memory (21) for predetermined bit rates and predetermined formats (synchronizing signals, each accompanied by at...
RE35449 Remote 2-way transmission audience polling and response system  
A remote response system includes a central control unit and a plurality of remotely-located response units each having keypads for entering a selection from a user. The central control unit...
5274843 Paging apparatus having a battery saving function  
A paging apparatus having a battery saving function comprises a power supply to a radio circuit and a power supply control circuit. Power is turned on periodically in synchronization with the...
5093786 Remote response system  
A remote response system includes a central control unit and a plurality of remotely-located response units each having keypads for entering a selection from a user. The central control unit...
5039984 Paging receiver with programmable areas of reception  
A paging receiver is disclosed which is compatible with transmissions from analog or digital paging transmitters. The paging receiver has a command structure which permits it to be dynamically...
4928100 Paging receiver for receiving pages from analog or digital paging transmitters  
A paging receiver is disclosed which is compatible with transmissions from analog or digital paging transmitters. The paging receiver has a command structure which permits it to be dynamically...
4818989 Selective calling decoder  
There is disclosed an aircraft selective calling decoder for decoding individual signal tones used in selectively signaling communication of a particular aircraft. The decoder is associated with a...
4742352 Radio communication system equipped with electronic appliance  
A radio communication system is used with an electronic appliance such as a wristwatch. The radio communication system includes a single transmitter unit including a first reference clock pulse...
4449248 Battery saving radio circuit and system  
An improved battery saving circuit for radio receivers and/or radio transceivers and/or radio communication systems of same under the control of one or more control radio transmitters and/or...
Matches 1 - 13 out of 13