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发明名称
Perfectionnements aux systèmes de centraux téléphoniques automatiques ou semi-automatiques ou analogues et aux appareils à prépayement employés avec ces systèmes
摘要
申请公布号
FR798577(A)
申请公布日期
1936.05.20
申请号
FRD798577
申请日期
1935.09.06
申请人
LE MATERIEL TELEPHONIQUE, SOCIETE ANONYME
发明人
分类号
H04M17/02
主分类号
H04M17/02
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