HEARING AID HAVING COMPENSATION FOR ACOUSTIC FEEDBACK,申请号GB19890019591-传众专利搜索

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发明名称	HEARING AID HAVING COMPENSATION FOR ACOUSTIC FEEDBACK
摘要
申请公布号	GB8919591(D0)	申请公布日期	1989.10.11
申请号	GB19890019591	申请日期	1989.08.30
申请人	GN DAVAVOX A.S.	发明人
分类号	H04R3/02;G01S7/527;G01S7/536;H03H21/00;H04R25/00;H04R25/02;H04R25/04	主分类号	H04R3/02
代理机构		代理人
主权项
地址

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