Cable spooling device for well drilling rigs,申请号US19470794390-传众专利搜索

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发明名称	Cable spooling device for well drilling rigs
摘要
申请公布号	US2453184(A)	申请公布日期	1948.11.09
申请号	US19470794390	申请日期	1947.12.29
申请人	GREEN & BERRY, INC.	发明人	BERRY THOMAS H.
分类号	B66D1/36	主分类号	B66D1/36
代理机构		代理人
主权项
地址

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