Spring loaded hydraulic adapter,申请号US19470770541-传众专利搜索

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发明名称	Spring loaded hydraulic adapter
摘要
申请公布号	US2513990(A)	申请公布日期	1950.07.04
申请号	US19470770541	申请日期	1947.08.25
申请人	INTERNATIONAL DERRICK & EQUIPMENT COMPANY	发明人	BENNETT JOHN D.
分类号	B66D3/06;E21B19/04	主分类号	B66D3/06
代理机构		代理人
主权项
地址

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