Improvements in or relating to electric frequency changers,申请号GB19380031584-传众专利搜索

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发明名称	Improvements in or relating to electric frequency changers
摘要
申请公布号	GB520842(A)	申请公布日期	1940.05.06
申请号	GB19380031584	申请日期	1938.11.01
申请人	ERICSSON TELEPHONES LIMITED;FREDRIC WILLIAM HOPWOOD	发明人
分类号	H03B19/10	主分类号	H03B19/10
代理机构		代理人
主权项
地址

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