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发明名称
Improvements to loudspeaking devices
摘要
申请公布号
GB2045028(A)
申请公布日期
1980.10.22
申请号
GB19790010246
申请日期
1979.03.23
申请人
THOMPSON M
发明人
分类号
H04R7/08;H04R9/04;H04R19/02;(IPC1-7):H04R1/00
主分类号
H04R7/08
代理机构
代理人
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