US4630152A
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Mechanical drive mechanism for the record/playback head and pinch roller of a cassette-type telephone answering machine
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US4560832A
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Telephone system
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US4596901A
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Telephone answering machine with remote control capabilities
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US4525603A
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Ring and line monitor for answering machine
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US4571458A
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Telephone answering system with additional message storage capabilities
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US4581485A
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Data storage system for telephone answering machine
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US4558179A
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Message playback control system for telephone answering machine
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US4577063A
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Ring delay override for telephone answering system
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US4549046A
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Telephone answering system with remote control capabilities
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US4451707A
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Ring detector and telephone line monitoring system for telephone answering instrument
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US4492828A
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Slide selector switch
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US4484036A
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Telephone ring detector system
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GB8302783D0
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Tape deck for a telephone answering machine
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US4499335A
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Announcement recording and message playback system for a telephone answering machine
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US4536624A
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Telephone answering machine interface circuit
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JPS5859659A
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Controller for telephone answering device
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GB2121648A
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Ring detector and telephone line monitoring system for telephone answering unit
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GB2107555A
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Coded remote control for telephone answering system
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US4527209A
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Cassette ejector mechanism
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US4400586A
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Remote message repeat control for telephone answering system
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