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发明名称
Reflecting sign
摘要
申请公布号
US2048800(A)
申请公布日期
1936.07.28
申请号
US19330704036
申请日期
1933.12.26
申请人
CORNING GLASS WORKS
发明人
LEVITT WILLIAM T.
分类号
G09F13/16
主分类号
G09F13/16
代理机构
代理人
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