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经营范围
发明名称
Hearing aids
摘要
申请公布号
US2962562(A)
申请公布日期
1960.11.29
申请号
US19570678980
申请日期
1957.08.19
申请人
BELTONE HEARING AID COMPANY
发明人
MCCARRELL STUART G.
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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