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发明名称
PERFECCIONAMIENTOS EN LOS SISTEMAS DE INTERCOMUNICACIoN EN ALTA VOZ
摘要
申请公布号
ES192895(A2)
申请公布日期
1951.03.01
申请号
ES19950001928
申请日期
1950.04.28
申请人
PLA ARVES, PEDRO;MAVE BARVEDA, JUAN;FERRERO ARVES, JESUS
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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