Feed nut operating mechanism for power drills,申请号US19470737895-传众专利搜索

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法人/股东/高管

发明名称	Feed nut operating mechanism for power drills
摘要
申请公布号	US2506988(A)	申请公布日期	1950.05.09
申请号	US19470737895	申请日期	1947.03.28
申请人	THE JEFFREY MANUFACTURING COMPANY	发明人	BELTZ JOHN S.
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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