Rock drill mounting,申请号US19340709567-传众专利搜索

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发明名称	Rock drill mounting
摘要
申请公布号	US2019659(A)	申请公布日期	1935.11.05
申请号	US19340709567	申请日期	1934.02.03
申请人	THE CLEVELAND ROCK DRILL COMPANY	发明人	CURTIS JOHN C.
分类号	E21B19/081	主分类号	E21B19/081
代理机构		代理人
主权项
地址

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