ELECTRONIC FILTERS, SIGNAL CONVERSION APPARATUS, HEARING AIDS + METHODS,申请号EP19890303482-传众专利搜索

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发明名称	ELECTRONIC FILTERS, SIGNAL CONVERSION APPARATUS, HEARING AIDS + METHODS
摘要
申请公布号	EP0339819(A3)	申请公布日期	1991.01.30
申请号	EP19890303482	申请日期	1989.04.10
申请人	CENTRAL INSTITUTE FOR THE DEAF	发明人	MORLEY, ROBERT E., JR.;ENGEL, GEORGE L.;ENGEBRETSON, A. MAYNARD;SULLIVAN, THOMAS J.
分类号	H04R25/04;H03H17/02;H03H19/00;H03H21/00;H03M1/66;H04R3/04;H04R25/00;H04R25/02;(IPC1-7):H03H17/02;H03M1/00	主分类号	H04R25/04
代理机构		代理人
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