Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Thales SA
Original Assignee
Le Materiel Telephonique Thomson CSF
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Filing date
Publication date
Application filed by Le Materiel Telephonique Thomson CSFfiledCriticalLe Materiel Telephonique Thomson CSF
Application grantedgrantedCritical
Publication of FR816535ApublicationCriticalpatent/FR816535A/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
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Engineering & Computer Science
(AREA)
Computer Networks & Wireless Communication
(AREA)
Computer Security & Cryptography
(AREA)
Signal Processing
(AREA)
FR816535D1935-10-111936-10-10Systèmes de signalisation électrique, en particulier pour la tarification des communications téléphoniques ou analogues
ExpiredFR816535A
(fr)