Improvements in or relating to electrical frequency changing apparatus,申请号GB19370010385-传众专利搜索

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发明名称	Improvements in or relating to electrical frequency changing apparatus
摘要
申请公布号	GB491103(A)	申请公布日期	1938.08.26
申请号	GB19370010385	申请日期	1937.04.12
申请人	THE GENERAL ELECTRIC COMPANY LIMITED;DOUGLAS AUBREY LEY	发明人
分类号	H03C1/52	主分类号	H03C1/52
代理机构		代理人
主权项
地址

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