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发明名称
EARPHONE HAVING SOUND DETOUR PATH
摘要
申请公布号
US3586794(A)
申请公布日期
1971.06.22
申请号
US19680772636
申请日期
1968.11.01
申请人
SENNHEISER ELECTRONIC
发明人
ERHARD MICHAELIS
分类号
H04R1/22;H04R9/10;(IPC1-7):H04R1/10
主分类号
H04R1/22
代理机构
代理人
主权项
地址
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