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FABRICATION ET LA VENTE DE TOU
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FABRICATION ET LA VENTE DE TOU
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Application filed by FABRICATION ET LA VENTE DE TOUfiledCriticalFABRICATION ET LA VENTE DE TOU
Application grantedgrantedCritical
Publication of FR765736ApublicationCriticalpatent/FR765736A/fr
H04M3/08—Indicating faults in circuits or apparatus
H04M3/12—Marking faulty circuits "busy"; Enabling equipment to disengage itself from faulty circuits ; Using redundant circuits; Response of a circuit, apparatus or system to an error
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Engineering & Computer Science
(AREA)
Signal Processing
(AREA)
FR765736D1933-12-181933-12-18Dispositif facilitant la constatation de la durée des communications téléphoniques
ExpiredFR765736A
(fr)