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发明名称
EARPHONES
摘要
申请公布号
HK11991(A)
申请公布日期
1991.02.22
申请号
HK19910000119
申请日期
1991.02.11
申请人
SONY CORPORATION
发明人
MAKOTO YAMAGISHI
分类号
H04R1/10;H04R1/22;H04R1/28;H04R9/06;(IPC1-7):H04R1/22
主分类号
H04R1/10
代理机构
代理人
主权项
地址
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