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发明名称
Totalizer and calculator
摘要
申请公布号
US2597123(A)
申请公布日期
1952.05.20
申请号
US19460683065
申请日期
1946.07.12
申请人
DAVEN COMPANY
发明人
NAEF ALFRED H.;JR. JOHN PRESTON SMITH,
分类号
G01R15/00
主分类号
G01R15/00
代理机构
代理人
主权项
地址
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