Coal cutting machine,申请号US19380215261-传众专利搜索

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发明名称	Coal cutting machine
摘要
申请公布号	US2189670(A)	申请公布日期	1940.02.06
申请号	US19380215261	申请日期	1938.06.22
申请人	NEWTON, CHAMBERS & COMPANY LIMITED	发明人	LEWIS OSWALD FLOYD
分类号	E21C27/04	主分类号	E21C27/04
代理机构		代理人
主权项
地址

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