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Application filed by August BaabfiledCriticalAugust Baab
Publication of CH3172ApublicationCriticalpatent/CH3172A/en
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
(AREA)
General Physics & Mathematics
(AREA)
CH3172A1891-03-071891-03-07
Electric alarm clock
CH3172A
(en)