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PIERRE-EMMANUEL-EMILE RAVEROT
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PIERRE-EMMANUEL-EMILE RAVEROT
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Publication of FR15744EpublicationCriticalpatent/FR15744E/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
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General Physics & Mathematics
(AREA)
FR15744D1911-06-221912-03-19
Improvement in remote control by electromagnetic movement reference
ExpiredFR15744E
(en)