Electric traffic signal,申请号US19410398935-传众专利搜索

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发明名称	Electric traffic signal
摘要
申请公布号	US2324419(A)	申请公布日期	1943.07.13
申请号	US19410398935	申请日期	1941.06.20
申请人	NELSON JAMES M	发明人	NELSON JAMES M.
分类号	B60Q1/38	主分类号	B60Q1/38
代理机构		代理人
主权项
地址

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