Bit for rotary coal cutting machines,申请号US19490114552-传众专利搜索

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发明名称	Bit for rotary coal cutting machines
摘要
申请公布号	US2702698(A)	申请公布日期	1955.02.22
申请号	US19490114552	申请日期	1949.09.08
申请人	THE COLMOL COMPANY	发明人	SNYDER CLIFFORD H.;HILL JAMES 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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