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TRAVEL AND LEARN COLLEGIUM OF
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TRAVEL AND LEARN COLLEGIUM OF
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Application filed by TRAVEL AND LEARN COLLEGIUM OFfiledCriticalTRAVEL AND LEARN COLLEGIUM OF
Priority to FR30536ApriorityCriticalpatent/FR1460658A/fr
Application grantedgrantedCritical
Publication of FR1460658ApublicationCriticalpatent/FR1460658A/fr
H04M17/00—Prepayment of wireline communication systems, wireless communication systems or telephone systems
H04M17/02—Coin-freed or check-freed systems, e.g. mobile- or card-operated phones, public telephones or booths
Landscapes
Engineering & Computer Science
(AREA)
Computer Networks & Wireless Communication
(AREA)
Computer Security & Cryptography
(AREA)
Signal Processing
(AREA)
FR30536A1965-09-061965-09-06Appareil pour déterminer la durée de fonctionnement d'un dispositif à partir d'une valeur enregistrée sur un support
ExpiredFR1460658A
(fr)
Perfectionnements à un dispositif pour régler automatiquement le pose-mètre incorporé d'un appareil photographique en fonction de la sensibilité du film