Drill cutter mounting,申请号US19290333691-传众专利搜索

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发明名称	Drill cutter mounting
摘要
申请公布号	US1820379(A)	申请公布日期	1931.08.25
申请号	US19290333691	申请日期	1929.01.19
申请人	REED ROLLER BIT COMPANY	发明人	DALLERUP JOHN R.
分类号	E21B10/10	主分类号	E21B10/10
代理机构		代理人
主权项
地址

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