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发明名称
Electromechanical calculator
摘要
申请公布号
US2418238(A)
申请公布日期
1947.04.01
申请号
US19420463846
申请日期
1942.10.29
申请人
SMITH CARL E
发明人
SMITH CARL E.
分类号
G06G7/22;G06G7/62
主分类号
G06G7/22
代理机构
代理人
主权项
地址
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