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发明名称
Glare reduction filter comprising light polarizing area merging gradually with transparent nonpolarizing area
摘要
申请公布号
US2475921(A)
申请公布日期
1949.07.12
申请号
US19400342467
申请日期
1940.06.26
申请人
POLAROID CORPORATION
发明人
SMITH ROBERT A.
分类号
G02C7/12
主分类号
G02C7/12
代理机构
代理人
主权项
地址
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