Hearing aid
US5347584A · kind A · utility
162Cited by
5References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 6, 1992 |
| Grant date | Sep 13, 1994 |
| Priority date | — |
| Expiry date | Mar 6, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2225/61
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A hearing aid is used to be inserted into and removed from an ear hole. A cam attached to a taking-out knob pushes up a battery holder by lifting up the taking-out knob when the hearing aid is taken out from an ear hole, whereby the electrode of the battery in the battery holder is left from the battery connecting tongues attached to a panel portion to thereby turn OFF a power supply. A howling prevention fixture is fixed to a hearing aid case at the head portion thereof to prevent howling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.