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发明名称
Eyeglass hearing aid construction
摘要
申请公布号
US3014994(A)
申请公布日期
1961.12.26
申请号
US19590800051
申请日期
1959.03.17
申请人
BELTONE HEARING AID COMPANY
发明人
POSEN SAM
分类号
G02C11/06
主分类号
G02C11/06
代理机构
代理人
主权项
地址
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