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发明名称
Traffic signal
摘要
申请公布号
US2006675(A)
申请公布日期
1935.07.02
申请号
US19320620678
申请日期
1932.07.02
申请人
FERGUSON ROBERT O
发明人
FERGUSON ROBERT O.
分类号
G08G1/095
主分类号
G08G1/095
代理机构
代理人
主权项
地址
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