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发明名称
Ray directing device
摘要
申请公布号
US2665387(A)
申请公布日期
1954.01.05
申请号
US19500200795
申请日期
1950.12.14
申请人
BARTOW BEACONS INC.
发明人
BARTOW JOHN B.
分类号
G21K1/04
主分类号
G21K1/04
代理机构
代理人
主权项
地址
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