Hearing Aid
|
PAT. NO. |
Title |
| 701 |
4,049,930 |
Hearing aid malfunction detection
system |
| 702 |
4,041,251 |
Hearing aid to be worn behind the
ear of the user and provided with a pressure-gradient microphone
|
| 703 |
4,010,820 |
Acoustic ear mold for hearing aid
|
| 704 |
3,983,336 |
Directional self containing ear
mounted hearing aid |
| 705 |
3,979,567 |
Microphone coupler for hearing aid
having inverted conical end configuration |
| 706 |
3,976,848 |
Disposable noise reducing hearing
aid attachment |
| 707 |
3,975,599 |
Directional/non-directional hearing
aid |
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