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Publication of FR685794ApublicationCriticalpatent/FR685794A/fr
G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
G08B9/00—Order telegraph apparatus, i.e. means for transmitting one of a finite number of different orders at the discretion of the user, e.g. bridge to engine room orders in ships
G08B9/02—Details
G08B9/04—Means for recording operation of the apparatus
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FR685794D1929-03-011929-03-01Dispositif de contrôle et d'enregistrement pour transmetteur d'ordres et autres applications
ExpiredFR685794A
(fr)