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经营范围
发明名称
Fractional wave films and polarizing systems containing them
摘要
申请公布号
US2285792(A)
申请公布日期
1942.06.09
申请号
US19390309079
申请日期
1939.12.13
申请人
E. I. DU PONT DE NEMOURS & COMPANY
发明人
BAILEY EMERSON DUDLEY
分类号
G02B5/30;G02B27/28
主分类号
G02B5/30
代理机构
代理人
主权项
地址
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