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发明名称
Hearing aid connection
摘要
申请公布号
US2857579(A)
申请公布日期
1958.10.21
申请号
US19560560795
申请日期
1956.01.23
申请人
SCANLON EDWARD C
发明人
SCANLON EDWARD C.
分类号
主分类号
代理机构
代理人
主权项
地址
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