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发明名称
Ear fittings
摘要
申请公布号
US3415246(A)
申请公布日期
1968.12.10
申请号
US19670677822
申请日期
1967.09.25
申请人
SIGMA SALES CORPORATION
发明人
HILL GEORGE M.
分类号
A61F11/08
主分类号
A61F11/08
代理机构
代理人
主权项
地址
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