Directional gyroscope for borehole testers and other uses,申请号US19300419483-传众专利搜索

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发明名称	Directional gyroscope for borehole testers and other uses
摘要
申请公布号	US1924816(A)	申请公布日期	1933.08.29
申请号	US19300419483	申请日期	1930.01.09
申请人	SPERRY GYROSCOPE COMPANY, INC.	发明人	JR. ELMER A. SPERRY,
分类号	E21B47/022	主分类号	E21B47/022
代理机构		代理人
主权项
地址

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