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发明名称
Reflecting sign
摘要
申请公布号
US1795071(A)
申请公布日期
1931.03.03
申请号
US19290375466
申请日期
1929.07.02
申请人
CORNELIS BEERSTECHER WILLEM KA
发明人
BEERSTECHER WILLEM KAREL CORNELIS
分类号
G09F13/16
主分类号
G09F13/16
代理机构
代理人
主权项
地址
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