Envelope control device for piezoelectric buzzer,申请号GB19800030890-传众专利搜索

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发明名称	Envelope control device for piezoelectric buzzer
摘要
申请公布号	GB2084781(A)	申请公布日期	1982.04.15
申请号	GB19800030890	申请日期	1980.09.25
申请人	CASIO COMPUTER CO LTD	发明人
分类号	G04G13/00;G10H1/057;(IPC1-7):G10H1/05;G04B21/00	主分类号	G04G13/00
代理机构		代理人
主权项
地址

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