Wax management system
US11140498B2 · kind B2 · utility
3Cited by
33References
38Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 14, 2018 |
| Grant date | Oct 5, 2021 |
| Priority date | — |
| Expiry date | Jun 3, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2460/17
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A guard for a space access device is configured to output air flow through a distal end portion thereof. The guard includes q housing having a proximal end opening, a distal end opening, and a filter portion positioned between the proximal and distal end openings. The filter includes a first plate having a first opening therethrough and a second plate having a second opening therethrough. When the first plate is overlaid in contact with the second plate, this forms an aperture that extends through both the first and second plates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.