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经营范围
发明名称
ELECTRET MICROPHONE
摘要
申请公布号
SG9583(G)
申请公布日期
1983.12.16
申请号
SG19830000095
申请日期
1983.03.04
申请人
HOSHIDENKI-SEIZO KABUSHIKI KAISHA
发明人
分类号
H04R19/00;H04R19/01;(IPC1-7):H04R19/04
主分类号
H04R19/00
代理机构
代理人
主权项
地址
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