Safety attachment for drilling machines,申请号US19450587461-传众专利搜索

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发明名称	Safety attachment for drilling machines
摘要
申请公布号	US2484731(A)	申请公布日期	1949.10.11
申请号	US19450587461	申请日期	1945.04.10
申请人	JESS PRITCHETT	发明人	PRITCHETT JESS
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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