| Number | Name | Date | Kind |
|---|---|---|---|
| D249941 | Bremseth | Oct 1978 | |
| D264841 | Pickrel | Jun 1982 | |
| D275852 | Brisson | Oct 1984 | |
| D334934 | Hsieh | Apr 1993 | |
| D354058 | Bohannan et al. | Jan 1995 | |
| 4633229 | Iacono et al. | Dec 1986 | |
| 5046581 | Mitchell | Aug 1991 |
| Entry |
|---|
| 1989 Meyer Sound Laboratories, Inc. product brochure entitled "UPA-IA". |
| 1989 Meyer Sound Laboratories, Inc. product brochure entitled "MSL-3". |