Improvements in and relating to electron discharge valve circuits,申请号GB19480019472-传众专利搜索

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发明名称	Improvements in and relating to electron discharge valve circuits
摘要
申请公布号	GB640842(A)	申请公布日期	1950.07.26
申请号	GB19480019472	申请日期	1948.07.20
申请人	A. C. COSSOR LIMITED;DENNIS HENRY COVILL	发明人
分类号	H04N5/60	主分类号	H04N5/60
代理机构		代理人
主权项
地址

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