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发明名称
PORTABLE APPARATUS FOR TRANSMITTING AUDIO SIGNALS TO A PERSON
摘要
申请公布号
GB2041695(B)
申请公布日期
1983.08.17
申请号
GB19790004353
申请日期
1979.02.07
申请人
WALKER J
发明人
分类号
A61F11/04;H04R11/00;H04R25/00;(IPC1-7):H04R25/00
主分类号
A61F11/04
代理机构
代理人
主权项
地址
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