Rock drilling mechanism,申请号US19360088321-传众专利搜索

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发明名称	Rock drilling mechanism
摘要
申请公布号	US2082418(A)	申请公布日期	1937.06.01
申请号	US19360088321	申请日期	1936.07.01
申请人	PALMER MARK A;PALMER JR MARK A	发明人	PALMER MARK A.;JR. MARK A. PALMER,
分类号	E21B21/015	主分类号	E21B21/015
代理机构		代理人
主权项
地址

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