Earplug
US4537187A · kind A · utility
34Cited by
7References
2Claims
0Family size
Inventor
Key dates
| Filing date | Oct 6, 1983 |
| Grant date | Aug 27, 1985 |
| Priority date | — |
| Expiry date | Oct 6, 2003 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F11/085
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An earplug particularly adapted for use by surfers and swimmers is provided having a small hole therein which keeps out water but which allows the user to hear, said plug being made of a soft plastic having a density of less than 1 whereby said plug will float.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.