Rock bucket for earth drilling,申请号US19580760715-传众专利搜索

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发明名称	Rock bucket for earth drilling
摘要
申请公布号	US3039547(A)	申请公布日期	1962.06.19
申请号	US19580760715	申请日期	1958.09.12
申请人	ROY GLOVER BILLY	发明人	GLOVER BILLY ROY
分类号	E21B7/00	主分类号	E21B7/00
代理机构		代理人
主权项
地址

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