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发明名称
Wearable hearing aid with a common casing for amplifier and batteries
摘要
申请公布号
US2789160(A)
申请公布日期
1957.04.16
申请号
US19530389021
申请日期
1953.10.29
申请人
SONOTONE CORPORATION
发明人
GAGE FRANKLIN A.
分类号
H04R25/04
主分类号
H04R25/04
代理机构
代理人
主权项
地址
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