|
US4635868A
|
|
End of rewind detector for a telephone answering device
|
|
US4584435A
|
|
Miniature telephone answering device with single head carriage
|
|
US4472599A
|
|
Control circuitry for a tape cassette telephone answering device
|
|
US4426554A
|
|
Tape drive transfer system for cassette telephone answering device with remote controlled playout
|
|
US4385205A
|
|
Single motor drive assembly for a tape cassette telephone answering device
|
|
US4390751A
|
|
End of rewind detection in a telephone answering device having remote playout
|
|
US4389545A
|
|
Remote rewind mechanism and control circuitry for a tape cassette telephone answering device
|
|
US4390752A
|
|
Ring detection circuit for a telephone answering device
|
|
US4400581A
|
|
Incoming audio detection circuit for a speaker telephone
|
|
US4306117A
|
|
Remote recording of new outgoing announcement in a telephone answering device
|
|
US4315104A
|
|
Automatically reset control mechanism for remote playout telephone answering device
|
|
US4315109A
|
|
Electronic ring sounder for a speaker telephone
|
|
US4236044A
|
|
Remote playout control mechanism for a telephone answering device
|
|
US4227053A
|
|
Telephone answering device having balanced input
|
|
US4201888A
|
|
Remote playout telephone answering device
|
|
US4264785A
|
|
Voltage regulator circuitry for a telephone answering device
|
|
US4213010A
|
|
Fail-safe mechanisms for a telephone answering device
|
|
US4160122A
|
|
Telephone earphone amplifier
|
|
US4126763A
|
|
Control circuit for a remote controlled telephone answering device
|
|
US4197426A
|
|
Remote playout telephone answering device
|
