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发明名称
Traffic control signal
摘要
申请公布号
US2079828(A)
申请公布日期
1937.05.11
申请号
US19360072542
申请日期
1936.04.03
申请人
FAY G. JOHNSON
发明人
WATSON CHARLES B.
分类号
G08G1/096
主分类号
G08G1/096
代理机构
代理人
主权项
地址
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