Improvements in friction gripping rollers,申请号GB19590021708-传众专利搜索

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发明名称	Improvements in friction gripping rollers
摘要
申请公布号	GB898572(A)	申请公布日期	1962.06.14
申请号	GB19590021708	申请日期	1959.06.24
申请人	DOWTY ROTOL LIMITED	发明人	KNIGHTS RICHARD NORTHAM
分类号	E21B19/16	主分类号	E21B19/16
代理机构		代理人
主权项
地址

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