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发明名称
Electromagnetic adding device for computers
摘要
申请公布号
US2699290(A)
申请公布日期
1955.01.11
申请号
US19510216361
申请日期
1951.03.19
申请人
WALTER HOPPE
发明人
HOPPE WALTER
分类号
G06F7/42
主分类号
G06F7/42
代理机构
代理人
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