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经营范围
发明名称
Optischer Schalter für Kopfhörer
摘要
申请公布号
DE69939228(D1)
申请公布日期
2008.09.11
申请号
DE19996039228
申请日期
1999.02.24
申请人
HELLO DIRECT INC.
发明人
MAGNASCO, JOHN H.;MAXON, ERIC K.
分类号
H04M1/05;H04R1/10
主分类号
H04M1/05
代理机构
代理人
主权项
地址
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