Safety device for mine cars,申请号US19390290287-传众专利搜索

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发明名称	Safety device for mine cars
摘要
申请公布号	US2186390(A)	申请公布日期	1940.01.09
申请号	US19390290287	申请日期	1939.08.15
申请人	EARL P. SMYTH	发明人	PUGH JOHN
分类号	B61H9/04	主分类号	B61H9/04
代理机构		代理人
主权项
地址

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