Improvements in or relating to secret communication systems,申请号GB19390014503-传众专利搜索

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发明名称	Improvements in or relating to secret communication systems
摘要
申请公布号	GB528819(A)	申请公布日期	1940.11.07
申请号	GB19390014503	申请日期	1939.05.15
申请人	MARCONI'S WIRELESS TELEGRAPH COMPANY, LIMITED	发明人
分类号	H04J3/04;H04K1/06	主分类号	H04J3/04
代理机构		代理人
主权项
地址

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