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经营范围
发明名称
Colorimetric apparatus
摘要
申请公布号
US2328631(A)
申请公布日期
1943.09.07
申请号
US19400356775
申请日期
1940.09.14
申请人
SPENCER LENS COMPANY
发明人
ESTEY ROGER S.
分类号
G01N21/29
主分类号
G01N21/29
代理机构
代理人
主权项
地址
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