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发明名称
ELECTROACOUSTIC TRANSDUCERS
摘要
申请公布号
GB2021899(B)
申请公布日期
1982.06.09
申请号
GB19790017588
申请日期
1979.05.21
申请人
SONY CORP
发明人
分类号
H04R9/00;H04R9/04;(IPC1-7):H04R9/00
主分类号
H04R9/00
代理机构
代理人
主权项
地址
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