Spinner hoist cat-head control,申请号US19360078786-传众专利搜索

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发明名称	Spinner hoist cat-head control
摘要
申请公布号	US2116497(A)	申请公布日期	1938.05.10
申请号	US19360078786	申请日期	1936.05.09
申请人	FOSTER WALTER W	发明人	FOSTER WALTER W.
分类号	E21B19/00	主分类号	E21B19/00
代理机构		代理人
主权项
地址

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