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发明名称
Traffic control system
摘要
申请公布号
US2126144(A)
申请公布日期
1938.08.09
申请号
US19300451459
申请日期
1930.05.10
申请人
O'D SHEPHERD JUDSON
发明人
SHEPHERD JUDSON O'D.
分类号
G08G1/082
主分类号
G08G1/082
代理机构
代理人
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地址
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