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发明名称
Envelope opener
摘要
申请公布号
US1756113(A)
申请公布日期
1930.04.29
申请号
US19290342276
申请日期
1929.02.23
申请人
LAMBERT BOLL
发明人
BOLL LAMBERT
分类号
B43M7/00
主分类号
B43M7/00
代理机构
代理人
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