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Application filed by Karl KeusenfiledCriticalKarl Keusen
Publication of CH34777ApublicationCriticalpatent/CH34777A/de
G04C21/00—Producing acoustic time signals by electrical means
G04C21/16—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times
G04C21/20—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times by closing a contact to ring an electromechanical alarm
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Physics & Mathematics
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General Physics & Mathematics
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CH34777A1905-10-251905-10-25Uhr mit elektrischer Weckeinrichtung
CH34777A
(de)