Improvements in signal tone generators used in telephony,申请号GB19500005433-传众专利搜索

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发明名称	Improvements in signal tone generators used in telephony
摘要
申请公布号	GB687208(A)	申请公布日期	1953.02.11
申请号	GB19500005433	申请日期	1950.03.03
申请人	DYNAMO & MOTOR REPAIRS LIMITED;GEORGE TOWNSEND TYLER	发明人
分类号	H02K39/00;H04M19/02	主分类号	H02K39/00
代理机构		代理人
主权项
地址

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