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经营范围
发明名称
Photographic reducer
摘要
申请公布号
US2227644(A)
申请公布日期
1941.01.07
申请号
US19390308775
申请日期
1939.12.12
申请人
AMERICAN CYANAMID COMPANY
发明人
HAM GARNET PHILIP
分类号
G03C5/42
主分类号
G03C5/42
代理机构
代理人
主权项
地址
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