Detachable blade bit,申请号US19450612416-传众专利搜索

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法人/股东/高管

发明名称	Detachable blade bit
摘要
申请公布号	US2615684(A)	申请公布日期	1952.10.28
申请号	US19450612416	申请日期	1945.08.24
申请人	HAWTHORNE HERBERT J	发明人	HAWTHORNE HERBERT J.
分类号	E21B10/62;E21B10/627	主分类号	E21B10/62
代理机构		代理人
主权项
地址

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