Secret signalling systems,申请号GB19400015839-传众专利搜索

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发明名称	Secret signalling systems
摘要
申请公布号	GB560923(A)	申请公布日期	1944.04.27
申请号	GB19400015839	申请日期	1940.10.29
申请人	PETER PENDLETON ECKERSLEY	发明人
分类号	H04K1/02	主分类号	H04K1/02
代理机构		代理人
主权项
地址

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