Counterweight mechanism for oil well pumps,申请号US19340723847-传众专利搜索

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发明名称	Counterweight mechanism for oil well pumps
摘要
申请公布号	US2023554(A)	申请公布日期	1935.12.10
申请号	US19340723847	申请日期	1934.05.04
申请人	SLONNEGER JOHN C	发明人	SLONNEGER JOHN C.
分类号	F04B47/02	主分类号	F04B47/02
代理机构		代理人
主权项
地址

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