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发明名称
Traffic signal
摘要
申请公布号
US2228835(A)
申请公布日期
1941.01.14
申请号
US19370172857
申请日期
1937.11.04
申请人
LEPPERT WILLIAM H
发明人
LEPPERT WILLIAM H.
分类号
G08G1/095
主分类号
G08G1/095
代理机构
代理人
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