Safety device for cross roads and hills,申请号US19320641601-传众专利搜索

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发明名称	Safety device for cross roads and hills
摘要
申请公布号	US1930917(A)	申请公布日期	1933.10.17
申请号	US19320641601	申请日期	1932.11.07
申请人	WING FREDERICK T	发明人	WING FREDERICK T.
分类号	G08B5/00	主分类号	G08B5/00
代理机构		代理人
主权项
地址

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