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发明名称
Fernsprechapparat mit Rufnummernanzeiger und Gespraechszeitmesser
摘要
申请公布号
DE700281(C)
申请公布日期
1940.12.17
申请号
DE193800T0205D
申请日期
1938.03.31
申请人
TELEFONBAU;NORMALZEIT G.M.B.H.
发明人
HEBEL DR.-ING. MARTIN;WIRTH ALEXANDER
分类号
H04M15/28
主分类号
H04M15/28
代理机构
代理人
主权项
地址
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