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发明名称
UN TELEFONO CON SENALIZACION POR MULTIFRECUENCIA.
摘要
申请公布号
ES453635(A1)
申请公布日期
1977.11.16
申请号
ES19350004536
申请日期
1976.11.25
申请人
STANDARD ELECTRICA, S. A.
发明人
分类号
H04M;H04M1/00;H04M1/50;H04M19/00;(IPC1-7):04M/
主分类号
H04M
代理机构
代理人
主权项
地址
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