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发明名称
Ray directing device
摘要
申请公布号
US2659017(A)
申请公布日期
1953.11.10
申请号
US19510210597
申请日期
1951.02.12
申请人
BARTOW BEACONS INC.
发明人
BARTOW JOHN B.
分类号
G21K1/02;G21K1/04
主分类号
G21K1/02
代理机构
代理人
主权项
地址
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