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发明名称
PERFEZIONAMENTO NEI SISTEMI TELEFONICI CON ALTOPARLANTI
摘要
申请公布号
IT8249018(D0)
申请公布日期
1982.08.23
申请号
IT19820049018
申请日期
1982.08.23
申请人
UNITED NETWORKS, INC.
发明人
ALFRED MAGNUS HESTAD;LEVI L. ROSE
分类号
H04M;(IPC1-7):H04M/
主分类号
H04M
代理机构
代理人
主权项
地址
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