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发明名称
Fernsprechanlage mit in gemeinsamer ruhestromueberwachter Leitung liegenden Stationen
摘要
申请公布号
DE677282(C)
申请公布日期
1939.06.22
申请号
DE1936T047349D
申请日期
1936.08.25
申请人
TELEFONBAU UND NORMALZEIT LEHNER & CO.
发明人
SAUTTER OTTO
分类号
H04M3/60
主分类号
H04M3/60
代理机构
代理人
主权项
地址
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