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Robert Bosch GmbH
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Robert Bosch GmbH
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Application filed by Robert Bosch GmbHfiledCriticalRobert Bosch GmbH
Application grantedgrantedCritical
Publication of FR1060219ApublicationCriticalpatent/FR1060219A/fr
G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
G08B1/00—Systems for signalling characterised solely by the form of transmission of the signal
G08B1/08—Systems for signalling characterised solely by the form of transmission of the signal using electric transmission ; transformation of alarm signals to electrical signals from a different medium, e.g. transmission of an electric alarm signal upon detection of an audible alarm signal
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Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
FR1060219D1951-07-171952-07-10Disposition de microphone pour appareil récepteur de signaux sonores
ExpiredFR1060219A
(fr)