|
| US4392547 | 11 Jun 1981 | 12 Jul 1983 | | Hearing aid earmolds |
| US4407389 | 19 Ene 1981 | 4 Oct 1983 | | Vented acoustic ear mold for hearing aids |
| US4412096 | 24 Dic 1980 | 25 Oct 1983 | Minnesota Mining and Manufacturing Company | Combination earmold and receiver adapter |
| US4442917 | 30 Sep 1982 | 17 Abr 1984 | | Vented acoustic ear mold for hearing aids |
| USD266590 | 28 Ene 1980 | 19 Oct 1982 | | Acoustic ear mold |
| USD628993 | 2 Oct 2007 | 14 Dic 2010 | Phitek Systems Limited | Noise reducing earphone capsule |
