Detachable self locking driving device,申请号US19540454315-传众专利搜索

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发明名称	Detachable self locking driving device
摘要
申请公布号	US2805073(A)	申请公布日期	1957.09.03
申请号	US19540454315	申请日期	1954.09.07
申请人	J. H. FLETCHER & CO.	发明人	FLETCHER WILLIAM F.
分类号	E21B19/24	主分类号	E21B19/24
代理机构		代理人
主权项
地址

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