Improvements in and relating to navigational systems,申请号GB19490004744-传众专利搜索

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发明名称	Improvements in and relating to navigational systems
摘要
申请公布号	GB664192(A)	申请公布日期	1952.01.02
申请号	GB19490004744	申请日期	1949.02.22
申请人	WALTER LEOPOLD STERN	发明人
分类号	G01S1/68	主分类号	G01S1/68
代理机构		代理人
主权项
地址

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