Hearing aid to be worn behind the ear having battery and volume control facing in opposite directions
US4783816A · kind A · utility
24Cited by
8References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 21, 1985 |
| Grant date | Nov 8, 1988 |
| Priority date | — |
| Expiry date | Mar 21, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2225/61
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A hearing aid of the type which is worn behind the ear has a battery compartment and a volume control knob at its lower end. The compartment and knob are at right angles to the longitudinal axis of the device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.