发明名称 Process for producing an aural communications receiving device
摘要 A process for making an aural communications receiving device of formed-in-place elastomeric composition constructed especially to provide a smooth, tight seal over the mouth of the ear canal when stretched and including a formed-in-place sound transmitting passageway acoustically coupled to an integral connecting means for securing a communications component or to an embedded speaker at an outwardly presented surface.
申请公布号 US4091067(A) 申请公布日期 1978.05.23
申请号 US19730382513 申请日期 1973.07.25
申请人 MARION HEALTH & SAFETY, INC. 发明人 KRAMER, HAROLD L.;LEWIS, FREDERICK M.
分类号 H04R1/10;H04R25/00;H04R25/02;(IPC1-7):B29D3/02;B29D31/00 主分类号 H04R1/10
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