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经营范围
发明名称
Envelope opening device
摘要
申请公布号
US1963873(A)
申请公布日期
1934.06.19
申请号
US19320635286
申请日期
1932.09.28
申请人
CARL C. CAVANAH
发明人
SMITH FRANK H.
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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