Blowing device for rock drills,申请号US19380239067-传众专利搜索

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法人/股东/高管

发明名称	Blowing device for rock drills
摘要
申请公布号	US2177391(A)	申请公布日期	1939.10.24
申请号	US19380239067	申请日期	1938.11.05
申请人	CHICAGO PNEUMATIC TOOL COMPANY	发明人	LEAR EARL B.
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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