Title:
Transistorized annunciator with a recorded message
United States Patent 3409745
Inventors:
Kock, Winston E.
Publication Date:
11/05/1968
Export Citation:
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Primary Class:
360/12
Other Classes:
340/286.12, 340/328, 360/61
International Classes:
G08B3/10; G08B3/00
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US Patent References:
3002187Door chime
2977418Combined oscillator and head phone for code practice
2910689Transistor horn
2821576Magnetic tape apparatus
2653819Magnetic recording system
2571973Annunciator
2517181Store window display system
2507385Magnetic sound recording and reproducing apparatus




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