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发明名称
VORRICHTUNG ZUR AUFZEICHNUNG VON TELEFONGESPRAECHEN.
摘要
申请公布号
DE1794260(U)
申请公布日期
1959.08.27
申请号
DE195800P3889U
申请日期
1958.10.25
申请人
PROTONA PRODUKTIONSGESELLSCHAFT FUER ELEKTRO-AKUSTISCHE GERAETE G.M.B.H.
发明人
分类号
主分类号
代理机构
代理人
主权项
地址
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