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发明名称
Punching and indexing apparatus for sheets, cards, and the like
摘要
申请公布号
US1778155(A)
申请公布日期
1930.10.14
申请号
US19270226695
申请日期
1927.10.17
申请人
HENRY HILDRETH WILLIAM
发明人
HILDRETH WILLIAM HENRY
分类号
G06K21/06
主分类号
G06K21/06
代理机构
代理人
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