Coal cutting bit having a skewed cutting face,申请号US19550517798-传众专利搜索

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发明名称	Coal cutting bit having a skewed cutting face
摘要
申请公布号	US2786663(A)	申请公布日期	1957.03.26
申请号	US19550517798	申请日期	1955.06.24
申请人	THE BOWDIL COMPANY	发明人	MORROW HARRY M.
分类号	E21C35/18	主分类号	E21C35/18
代理机构		代理人
主权项
地址

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