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发明名称
HEARING AID WITH A DIRECTIVE MICROPHONE HAVING VARIABLE DIRECTIVITY
摘要
申请公布号
EP0466676(A3)
申请公布日期
1992.07.29
申请号
EP19910890130
申请日期
1991.06.25
申请人
VIENNATONE GESELLSCHAFT M.B.H.
发明人
RIBIC, ZLATAN, DIPL.-ING., DR.
分类号
H04R1/38;H04R19/01;H04R25/00;(IPC1-7):H04R25/00;H04R3/00;H04R19/00
主分类号
H04R1/38
代理机构
代理人
主权项
地址
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