Coal-mining machine,申请号US19420468794-传众专利搜索

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发明名称	Coal-mining machine
摘要
申请公布号	US2346679(A)	申请公布日期	1944.04.18
申请号	US19420468794	申请日期	1942.12.12
申请人	EDWIN HAIR CHARLES;HAIR RICHARD T	发明人	HAIR CHARLES EDWIN;HAIR RICHARD T.
分类号	E21C37/08	主分类号	E21C37/08
代理机构		代理人
主权项
地址

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