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发明名称
Self-closing safety pin
摘要
申请公布号
US2679673(A)
申请公布日期
1954.06.01
申请号
US19500185400
申请日期
1950.09.18
申请人
CHALK THOMAS C
发明人
CHALK THOMAS C.
分类号
A44B9/14
主分类号
A44B9/14
代理机构
代理人
主权项
地址
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