Improvements in and relating to alarm devices for thermionic valve circuits,申请号GB19370006441-传众专利搜索

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发明名称	Improvements in and relating to alarm devices for thermionic valve circuits
摘要
申请公布号	GB485891(A)	申请公布日期	1938.05.26
申请号	GB19370006441	申请日期	1937.03.04
申请人	TELEPHONE MANUFACTURING COMPANY, LIMITED;LESLIE HAROLD PADDLE	发明人
分类号	H03F1/54	主分类号	H03F1/54
代理机构		代理人
主权项
地址

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