Improvements in or relating to electrical devices for use in checking the equality of two frequencies,申请号GB19450033931-传众专利搜索

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发明名称	Improvements in or relating to electrical devices for use in checking the equality of two frequencies
摘要
申请公布号	GB605121(A)	申请公布日期	1948.07.16
申请号	GB19450033931	申请日期	1945.12.14
申请人	PHILIPS LAMPS LIMITED	发明人
分类号	H04H20/67	主分类号	H04H20/67
代理机构		代理人
主权项
地址

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