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发明名称
Illuminated indicator using light polarizing elements
摘要
申请公布号
US2454280(A)
申请公布日期
1948.11.23
申请号
US19450604941
申请日期
1945.07.13
申请人
HARDESTY GEORGE K C
发明人
HARDESTY GEORGE K. C.
分类号
G04B19/30
主分类号
G04B19/30
代理机构
代理人
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