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发明名称
ACOUSTIC APPARATUS
摘要
申请公布号
EP0332053(A3)
申请公布日期
1991.04.17
申请号
EP19890103682
申请日期
1989.03.02
申请人
YAMAHA CORPORATION
发明人
YOKOYAMA, KENJI
分类号
H04R1/28;H04R3/00;(IPC1-7):H04R3/04
主分类号
H04R1/28
代理机构
代理人
主权项
地址
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