Communications: electrical – Continuously variable indicating – With meter reading
Patent
1994-11-04
1997-07-22
Liang, Regina D.
Communications: electrical
Continuously variable indicating
With meter reading
34082531, 34082569, 34082572, G06F 704
Patent
active
056507747
ABSTRACT:
A remote control access system which may be in the form of a security system or a convenience system for buildings and vehicles to thereby enable access opening and closing of buildings and vehicles. The system is operable on a remote control basis and comprises one or more hand held remote transmitters and a receiver unit located at or near the building or in the vehicle. The receiver is operable in conjunction with a control unit which contains a microprocessor capable of performing control functions and decoding functions. The remote control access system is unique in that it enables the user to electronically program into or delete from the receiver a digital code or so-called encoding signal from any of a plurality of transmitters. Each transmitter may contain not only different numbers of digital codes, but also a code generated by an entirely different method of encoding. Moreover, it is not necessary for the user or anyone else to know the specific encoded signal which is transmitted from any of the transmitters to the receiver. The receiver is operable with a plurality of transmitters, all of which operate on the same frequency. The present invention also provides an anti-sequencing capability such that one cannot use an electronic sequencer for detecting the code of the transmitter for purposes of violating the security system.
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Translation Document Re French Patent 2,580,128.
Clifford Electronics, Inc.
Liang Regina D.
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