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发明名称
Seat burr
摘要
申请公布号
US1813741(A)
申请公布日期
1931.07.07
申请号
US19290415763
申请日期
1929.12.21
申请人
HARPER WILLIAM E
发明人
HARPER WILLIAM E.
分类号
A61C3/02
主分类号
A61C3/02
代理机构
代理人
主权项
地址
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