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发明名称
Method of producing direct positive photographs having increased density
摘要
申请公布号
US2497917(A)
申请公布日期
1950.02.21
申请号
US19470780569
申请日期
1947.10.17
申请人
EASTMAN KODAK COMPANY
发明人
STAUFFER ROBERT ELIOT
分类号
G03C1/485
主分类号
G03C1/485
代理机构
代理人
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