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发明名称
Letter opener
摘要
申请公布号
US2248140(A)
申请公布日期
1941.07.08
申请号
US19390308627
申请日期
1939.12.11
申请人
BROWN & BIGELOW
发明人
TROLLEN MARTIN E.
分类号
B43M7/00
主分类号
B43M7/00
代理机构
代理人
主权项
地址
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