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经营范围
发明名称
Perfectionnements aux systèmes téléphoniques automatiques
摘要
申请公布号
FR852985(A)
申请公布日期
1940.03.07
申请号
FRD852985
申请日期
1938.10.26
申请人
COMPAGNIE DES TELEPHONES THOMSON-HOUSTON
发明人
分类号
H04Q3/58
主分类号
H04Q3/58
代理机构
代理人
主权项
地址
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