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发明名称
Letter opener
摘要
申请公布号
US3142119(A)
申请公布日期
1964.07.28
申请号
US19620174084
申请日期
1962.02.19
申请人
O'BRIEN PATRICK R
发明人
O'BRIEN PATRICK R.
分类号
B43M7/00
主分类号
B43M7/00
代理机构
代理人
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