Apparatus for cooling well surveying instruments,申请号US19510215760-传众专利搜索

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发明名称	Apparatus for cooling well surveying instruments
摘要
申请公布号	US2671323(A)	申请公布日期	1954.03.09
申请号	US19510215760	申请日期	1951.03.15
申请人	SUN OIL COMPANY	发明人	RICHERT BERNHARD E.
分类号	E21B36/00;E21B47/01	主分类号	E21B36/00
代理机构		代理人
主权项
地址

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