Safety block for mine cars,申请号US19290342118-传众专利搜索

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发明名称	Safety block for mine cars
摘要
申请公布号	US1759791(A)	申请公布日期	1930.05.20
申请号	US19290342118	申请日期	1929.02.23
申请人	KECK CARL F	发明人	KECK CARL F.
分类号	B61K7/20	主分类号	B61K7/20
代理机构		代理人
主权项
地址

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