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HENRI MARTINY
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HENRI MARTINY
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Publication of FR24235EpublicationCriticalpatent/FR24235E/en
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
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Physics & Mathematics
(AREA)
General Physics & Mathematics
(AREA)
FR24235A1920-10-131920-10-13
Electrical device for signal transmission
ExpiredFR24235E
(en)