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.
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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 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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