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发明名称
Digital printer and card punch machine
摘要
申请公布号
US2931291(A)
申请公布日期
1960.04.05
申请号
US19570677703
申请日期
1957.08.12
申请人
SAFEGUARD CORPORATION
发明人
HOPP ROBERT E.
分类号
主分类号
代理机构
代理人
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地址
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