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发明名称
Perfectionnements aux arrangements commutateurs pour systèmes téléphoniques utilisés dans les bureaux centraux automatiques ou semi-automatiques
摘要
申请公布号
FR677096(A)
申请公布日期
1930.03.03
申请号
FRD677096
申请日期
1929.06.14
申请人
LE MATERIEL TELEPHONIQUE
发明人
分类号
H04Q3/00
主分类号
H04Q3/00
代理机构
代理人
主权项
地址
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