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发明名称
Color filter for photographic safelight lamp
摘要
申请公布号
US2265571(A)
申请公布日期
1941.12.09
申请号
US19400340234
申请日期
1940.06.13
申请人
DEFENDER PHOTO SUPPLY CO., INC.
发明人
ODELL ISAAC N.
分类号
G03D17/00
主分类号
G03D17/00
代理机构
代理人
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地址
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