Railway safety automatic track device,申请号US19350001409-传众专利搜索

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发明名称	Railway safety automatic track device
摘要
申请公布号	US2051742(A)	申请公布日期	1936.08.18
申请号	US19350001409	申请日期	1935.01.11
申请人	POYNTER HENSON W	发明人	POYNTER HENSON W.
分类号	B61L11/00	主分类号	B61L11/00
代理机构		代理人
主权项
地址

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