Navigation instrument,申请号US19340710127-传众专利搜索

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发明名称	Navigation instrument
摘要
申请公布号	US2051810(A)	申请公布日期	1936.08.25
申请号	US19340710127	申请日期	1934.02.07
申请人	FRANK E. CROUCHER	发明人	ASHLOCK ERNEST H.
分类号	G01C21/02	主分类号	G01C21/02
代理机构		代理人
主权项
地址

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