Separable connection for rock drills and like structures,申请号US19430503804-传众专利搜索

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发明名称	Separable connection for rock drills and like structures
摘要
申请公布号	US2379472(A)	申请公布日期	1945.07.03
申请号	US19430503804	申请日期	1943.09.25
申请人	BOWMAN EDWARD J	发明人	BOWMAN EDWARD J.
分类号	E21B17/046	主分类号	E21B17/046
代理机构		代理人
主权项
地址

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