Keying systems for radio-frequency electric wave transmitters,申请号GB19470033874-传众专利搜索

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发明名称	Keying systems for radio-frequency electric wave transmitters
摘要
申请公布号	GB635650(A)	申请公布日期	1950.04.12
申请号	GB19470033874	申请日期	1947.12.22
申请人	COMMUNICATIONS PATENTS LIMITED;DONALD JOSEPH SPOONER	发明人
分类号	H04L27/04	主分类号	H04L27/04
代理机构		代理人
主权项
地址

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