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发明名称
Perfectionnements aux systèmes téléphoniques, spécialement aux systèmes utilisés dans l'interconnexion automatique
摘要
申请公布号
FR976945(A)
申请公布日期
1951.03.23
申请号
FRD976945
申请日期
1942.05.16
申请人
COMPAGNIE GENERALE D'ELECTRICITE
发明人
LESIGNE HENRI-LOUIS
分类号
H04Q3/42
主分类号
H04Q3/42
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代理人
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