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发明名称
Appareil téléphonique à prépaiement
摘要
申请公布号
FR813539(A)
申请公布日期
1937.06.03
申请号
FRD813539
申请日期
1936.11.14
申请人
发明人
ENGEL HERMANN
分类号
G07F5/00;H04M1/677;H04M17/02
主分类号
G07F5/00
代理机构
代理人
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