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发明名称
Electrical calculating machine
摘要
申请公布号
US2319106(A)
申请公布日期
1943.05.11
申请号
US19370144081
申请日期
1937.05.21
申请人
ELECTRICAL IMPROVEMENTS LIMITED
发明人
BLACKBURN CHARLES LORD
分类号
G06G7/22;G06G7/63;G06G7/68
主分类号
G06G7/22
代理机构
代理人
主权项
地址
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