Patent
1977-12-22
1980-05-13
Konick, Bernard
H04M 164
Patent
active
042030072
ABSTRACT:
A system for receiving a remote control signal in an automatic telephone answering device, in which the remote control signal is detected from a transmission line by the use of a remote control signal detector including a filter so that a message to the transmission line is sent out in response to the detected output of the remote control signal detector. The message from a line for sending the message to the transmission line is extracted after sufficiently attenuating the remote control signal by a directional circuit. The frequency components corresponding to the remote control signal are selected by a second filter from the message extracted, so that when the filter output of the second filter is obtained, transmission of the message to the transmission line is inhibited during the duration of the filter output of the second filter.
REFERENCES:
patent: 3337690 (1967-08-01), Martin
patent: 3508004 (1970-04-01), Waldman
patent: 3511934 (1970-05-01), Mizuno
patent: 3511935 (1970-05-01), Mizuno
patent: 3647985 (1972-03-01), Langendorf et al.
patent: 3673332 (1972-06-01), Muller et al.
patent: 3867578 (1975-02-01), Uechi
patent: 4031323 (1977-06-01), Ando et al.
Hatori Nobuyoshi
Morigami Eiiji
Adams Bruce L.
Burns Robert E.
Iwasaki Tsushinki Kabushiki Kaisha
Konick Bernard
Lobato Emmanuel J.
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