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发明名称
ELEKTRONISCHER SCHALTKREIS FUER EINEN LAUTFERNSPRECHER
摘要
申请公布号
DE2748344(A1)
申请公布日期
1978.05.03
申请号
DE19772748344
申请日期
1977.10.28
申请人
TECHNEX INTERNATIONAL LTD.
发明人
CLARK,JEREMY;ALLEN,ROBERT
分类号
H04R3/02;(IPC1-7):H04M1/60;H04M9/08
主分类号
H04R3/02
代理机构
代理人
主权项
地址
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