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发明名称
Counting card
摘要
申请公布号
US1857038(A)
申请公布日期
1932.05.03
申请号
US19310530103
申请日期
1931.04.14
申请人
SAUL BADANES
发明人
BADANES SAUL
分类号
G09B19/02
主分类号
G09B19/02
代理机构
代理人
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