发明名称 High sound attenuating hearing protection device
摘要 A hearing protection device insertable into an earcanal is provided, the device generally including a stem portion, a sound attenuating portion affixed to and extending at least partially over the stem portion, and a volume of space disposed between and delimited by the sound attenuating portion and the stem portion, where at least a part of the sound attenuating portion is collapsible into the volume of space during insertion of the hearing protection device into the earcanal.
申请公布号 US2005274568(A1) 申请公布日期 2005.12.15
申请号 US20040866212 申请日期 2004.06.11
申请人 FALCO ROBERT N;KNAUER RICHARD;SEVILLE ALAN R 发明人 FALCO ROBERT N.;KNAUER RICHARD;SEVILLE ALAN R.
分类号 A61F11/08;(IPC1-7):H04R25/02;A61B7/02 主分类号 A61F11/08
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