Earth boring drill,申请号US19350052272-传众专利搜索

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发明名称	Earth boring drill
摘要
申请公布号	US2076003(A)	申请公布日期	1937.04.06
申请号	US19350052272	申请日期	1935.11.29
申请人	CHICAGO PNEUMATIC TOOL COMPANY	发明人	REED CLARENCE E.
分类号	E21B10/22	主分类号	E21B10/22
代理机构		代理人
主权项
地址

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