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发明名称
In-ear hearing aid
摘要
申请公布号
US2987584(A)
申请公布日期
1961.06.06
申请号
US19580776921
申请日期
1958.11.28
申请人
WEBBER MELVYN E;DAVID SKARZYNSKI;ULRICH THOMAS F
发明人
WEBBER MELVYN E.;SKARZYNSKI DAVID;ULRICH THOMAS F.
分类号
H04R25/00;H04R25/02
主分类号
H04R25/00
代理机构
代理人
主权项
地址
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