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发明名称
PERFECCIONAMIENTOS EN, O RELATIVOS A, DISPOSITIVOS AMPLIFICADORES PARA USO CON APARATOS TELEFoNICOS
摘要
申请公布号
ES249259(A3)
申请公布日期
1959.10.16
申请号
ES19590002492
申请日期
1959.05.09
申请人
FONADEK (BRANSON) LIMITED
发明人
分类号
(IPC1-7):H04
主分类号
(IPC1-7):H04
代理机构
代理人
主权项
地址
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