Improvements in electromagnetic apparatus for determining a direction,申请号GB19460017744-传众专利搜索

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发明名称	Improvements in electromagnetic apparatus for determining a direction
摘要
申请公布号	GB642303(A)	申请公布日期	1950.08.30
申请号	GB19460017744	申请日期	1946.06.13
申请人	HENRI GEORGES DE FRANCE	发明人
分类号	G01S3/42	主分类号	G01S3/42
代理机构		代理人
主权项
地址

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