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发明名称
摘要
申请公布号
CH625928(A5)
申请公布日期
1981.10.15
申请号
CH19810000407
申请日期
1981.01.22
申请人
LECTRET SA
发明人
PRESTON MURPHY
分类号
H04R17/00;(IPC1-7):04R17/00
主分类号
H04R17/00
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代理人
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