
US Patent No: 4,715,060
Number of patents in Portfolio can not be more than 2000
Door message apparatus with telephone answering device
Stats
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Dec 22, 1987
Issued date -
Jul 15, 1985
filing date -
06/754,577
serial no -
Expired
status
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Abstract
A door message apparatus has a control unit which responds to operation of a doorbell switch to connect a door speaker/microphone to an automatic telephone answering and recording machine. The control unit applies a ring signal to the answering machine so that the machine then plays back a prerecorded message which is broadcast to the door caller. After the playback, the door caller may talk into the door speaker/microphone to produce a message which is recorded by the answering machine.
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 4,243,973 Home integrated signal system | 16 | 1979 | |