FR758569A - Perfectionnements aux appareils avertisseurs électro-magnétiques contre le vol et aux autres appareils destinés à donner l'alarme
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Perfectionnements aux appareils avertisseurs électro-magnétiques contre le vol et aux autres appareils destinés à donner l'alarme
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G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
G08B13/00—Burglar, theft or intruder alarms
G08B13/22—Electrical actuation
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FR758569D1933-07-181933-07-18Perfectionnements aux appareils avertisseurs électro-magnétiques contre le vol et aux autres appareils destinés à donner l'alarme
ExpiredFR758569A
(fr)