发明名称 Ear plug assembly
摘要 An ear plug assembly includes a pair of plug bodies made from open cell resilient foam material having a slow recovery rate which are interconnected by a flexible cord having its free ends inserted into preformed holes in the plug bodies before the holes close under the influence of the recovery rate.
申请公布号 US4253452(A) 申请公布日期 1981.03.03
申请号 US19790042092 申请日期 1979.05.24
申请人 SPECIALTY COMPOSITES CORPORATION 发明人 POWERS, WILLIAM R.;LOTTER, JR., WILLIAM H.
分类号 A61F11/08;A61F11/10;A61F11/12;(IPC1-7):A61F11/00 主分类号 A61F11/08
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