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发明名称
Procédé et dispositif de télécommunication avec modification de la bande de fréquences
摘要
申请公布号
FR61421(E)
申请公布日期
1955.05.04
申请号
FRD61421
申请日期
1951.02.20
申请人
TELEFONBAU UND NORMALZEIT G.M.B.H.
发明人
分类号
H01J31/64;H04J3/18
主分类号
H01J31/64
代理机构
代理人
主权项
地址
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