Improvements in gyroscopic directional devices and borehole surveying instruments incorporating the same,申请号US19610106739-传众专利搜索

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发明名称	Improvements in gyroscopic directional devices and borehole surveying instruments incorporating the same
摘要
申请公布号	US3079696(A)	申请公布日期	1963.03.05
申请号	US19610106739	申请日期	1961.05.01
申请人	ROOYEN DANIEL W VAN;FRASER STS	发明人	ROOYEN DANIEL W. VAN;STS. FRASER
分类号	E21B47/02;G01C19/38	主分类号	E21B47/02
代理机构		代理人
主权项
地址

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