Train order and signal hoop,申请号US19280252248-传众专利搜索

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发明名称	Train order and signal hoop
摘要
申请公布号	US1746388(A)	申请公布日期	1930.02.11
申请号	US19280252248	申请日期	1928.02.06
申请人	FOLTZ FRED W	发明人	FOLTZ FRED W.
分类号	B61L5/12	主分类号	B61L5/12
代理机构		代理人
主权项
地址

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