Rock drill,申请号US19410378908-传众专利搜索

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发明名称	Rock drill
摘要
申请公布号	US2291801(A)	申请公布日期	1942.08.04
申请号	US19410378908	申请日期	1941.02.14
申请人	THE CLEVELAND ROCK DRILL COMPANY	发明人	FEUCHT ALBERT
分类号	E21B21/01	主分类号	E21B21/01
代理机构		代理人
主权项
地址

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