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经营范围
发明名称
Polarizing safe light
摘要
申请公布号
US2263684(A)
申请公布日期
1941.11.25
申请号
US19400369588
申请日期
1940.12.11
申请人
POLAROID CORPORATION
发明人
RYAN WILLIAM H.
分类号
F21V9/10;F21V9/14;G03D17/00
主分类号
F21V9/10
代理机构
代理人
主权项
地址
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