Combination packer washer and well booster,申请号US19390305345-传众专利搜索

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发明名称	Combination packer washer and well booster
摘要
申请公布号	US2227545(A)	申请公布日期	1941.01.07
申请号	US19390305345	申请日期	1939.11.20
申请人	HASLAM MILTON S	发明人	HASLAM MILTON S.
分类号	E21B31/03;E21B37/00	主分类号	E21B31/03
代理机构		代理人
主权项
地址

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