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发明名称
HEADPHONE APPARATUS
摘要
申请公布号
GB1543831(A)
申请公布日期
1979.04.11
申请号
GB19760006852
申请日期
1976.02.20
申请人
MATSUSHITA ELECTRIC IND CO LTD
发明人
分类号
H04S1/00;(IPC1-7):H04H7/00;H04R1/28
主分类号
H04S1/00
代理机构
代理人
主权项
地址
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