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经营范围
发明名称
ELECTRIC ACOUSTIC DEVICE
摘要
申请公布号
GB2011664(A)
申请公布日期
1979.07.11
申请号
GB19780048251
申请日期
1978.12.13
申请人
DAINI SEIKOSHA KK
发明人
分类号
G10K9/20;G04C21/02;G10K9/02;G10K9/12;G10K9/122;G10K9/13;(IPC1-7):G04C21/34
主分类号
G10K9/20
代理机构
代理人
主权项
地址
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