Improvements in direction finders incorporating electron devices,申请号GB19290021534-传众专利搜索

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发明名称	Improvements in direction finders incorporating electron devices
摘要
申请公布号	GB334995(A)	申请公布日期	1930.09.18
申请号	GB19290021534	申请日期	1929.07.12
申请人	PERRYMAN ELECTRIC CO., INC.	发明人
分类号		主分类号
代理机构		代理人
主权项
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