| Number | Name | Date | Kind |
|---|---|---|---|
| D201398 | Burns et al. | Jun 1965 | |
| D234273 | Wilson et al. | Feb 1975 | |
| D246854 | Baker | Jan 1978 | |
| D276025 | Hexamer | Oct 1984 | |
| 3419184 | Asenbauer | Dec 1968 | |
| 4018338 | Lemkin | Apr 1977 | |
| 4267700 | Minter | May 1981 | |
| 5042674 | Ramsay et al. | Aug 1991 |
| Entry |
|---|
| Lewisystems, 1983 Cat. p. 26, as shown. |