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发明名称
Calculating machine
摘要
申请公布号
US1938907(A)
申请公布日期
1933.12.12
申请号
US19310557293
申请日期
1931.08.15
申请人
HOSACK FRANCIS A
发明人
HOSACK FRANCIS A.
分类号
G06C19/04
主分类号
G06C19/04
代理机构
代理人
主权项
地址
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