| Number | Name | Date | Kind |
|---|---|---|---|
| D216428 | Bearse | Jan 1970 | |
| D272906 | Heinzelman et al. | Mar 1984 | |
| D299343 | Friedrich | Jan 1989 | |
| D319642 | Ando | Sep 1991 | |
| D322612 | Abrams | Dec 1991 | |
| D334751 | Westwood | Apr 1993 | |
| 4782522 | Kramer et al. | Nov 1988 | |
| 4790004 | Nalbone | Dec 1988 |
| Entry |
|---|
| NEC Brochure, at lower center. |