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发明名称
HEARING AID TRANSDUCER
摘要
申请公布号
EP0377074(A3)
申请公布日期
1992.03.25
申请号
EP19890110391
申请日期
1989.06.08
申请人
INDUSTRIAL RESEARCH PRODUCTS, INC.
发明人
CARLSON, ELMER V.
分类号
A61F11/00;H04R1/10;H04R25/00;H04R25/02;(IPC1-7):H04R25/02
主分类号
A61F11/00
代理机构
代理人
主权项
地址
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