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Application filed by Landis & Gyr AgfiledCriticalLandis & Gyr Ag
Publication of CH194053ApublicationCriticalpatent/CH194053A/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
(AREA)
Signal Processing
(AREA)
Alarm Systems
(AREA)
CH194053D1937-02-251937-02-25Rückmeldeeinrichtung für Alarmgeräte steuernde Fernsteueranlagen unter Verwendung von synchronlaufenden Kontaktwählern.
CH194053A
(de)