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发明名称
Supra-aural headphone noise reducing
摘要
An earphone for a supra-aural noise reducing headphone, with a front cavity that includes a foam portion and an open passageway. The foam portion supplements the volumetric dimension of the passageway.
申请公布号
US2006269090(A1)
申请公布日期
2006.11.30
申请号
US20050139045
申请日期
2005.05.27
申请人
SAPIEJEWSKI ROMAN
发明人
SAPIEJEWSKI ROMAN
分类号
H04R25/00
主分类号
H04R25/00
代理机构
代理人
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