Earplug and earplug set
US4314553A · kind A · utility
97Cited by
12References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 8, 1979 |
| Grant date | Feb 9, 1982 |
| Priority date | — |
| Expiry date | Aug 8, 1999 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F11/08
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An earplug comprising a stem portion and a front portion mounted on the stem portion. The front portion is conically shaped and disposed such that the inner surface of the front portion is spaced from the stem portion. At least one spacing member may be provided which is adapted to space the interior surface of the front portion from the stem portion. The earplug may further comprise an axial bore therein adapted to receive a cord such that two of the earplugs may be connected by the cord so as to form a set.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.