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经营范围
发明名称
Caculating machine
摘要
申请公布号
US2946505(A)
申请公布日期
1960.07.26
申请号
US19560571289
申请日期
1956.03.13
申请人
FRIDEN, INC.
发明人
DAVIS ELWOOD A.
分类号
F16K31/00;G06M1/36
主分类号
F16K31/00
代理机构
代理人
主权项
地址
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