Improvements in electric resistance tubes and particularly variator tubes,申请号GB19310028143-传众专利搜索

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发明名称	Improvements in electric resistance tubes and particularly variator tubes
摘要
申请公布号	GB377503(A)	申请公布日期	1932.07.28
申请号	GB19310028143	申请日期	1931.10.09
申请人	N. V. PHILIPS' GLOEILAMPENFABRIEKEN	发明人
分类号	H01C7/13	主分类号	H01C7/13
代理机构		代理人
主权项
地址

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