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发明名称
HEARING IMPROVEMENT DEVICE
摘要
申请公布号
EP0904034(A1)
申请公布日期
1999.03.31
申请号
EP19970921435
申请日期
1997.05.05
申请人
RESOUND CORPORATION
发明人
GOODE, RICHARD
分类号
A61F2/18;A61F11/00;H04R25/00;(IPC1-7):A61F2/18
主分类号
A61F2/18
代理机构
代理人
主权项
地址
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