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Application filed by Securiton AgfiledCriticalSecuriton Ag
Publication of CH341540ApublicationCriticalpatent/CH341540A/de
H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
H04M11/04—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems
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Engineering & Computer Science
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Signal Processing
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CH341540D1955-02-221955-02-22Elektrischer Alarmgeber mit Motor
CH341540A
(de)