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LUCIEN VIALET CHABRAND
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LUCIEN VIALET CHABRAND
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Publication date
Application filed by LUCIEN VIALET CHABRANDfiledCriticalLUCIEN VIALET CHABRAND
Application grantedgrantedCritical
Publication of FR468759ApublicationCriticalpatent/FR468759A/fr
G08B—SIGNALLING OR 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