| Number | Name | Date | Kind |
|---|---|---|---|
| D381863 | Vineis | Aug 1997 | |
| 2193356 | Green | Mar 1940 | |
| 2504727 | Post | Apr 1950 | |
| 2802499 | Tupper | Aug 1957 | |
| 2858118 | Perkins | Oct 1958 | |
| 3913896 | Hawke | Oct 1975 | |
| 3960370 | Bewley | Jun 1976 | |
| 4549811 | Schiffner et al. | Oct 1985 | |
| 5556203 | Filias | Sep 1996 |
| Entry |
|---|
| Commonly-owned utility patent application serial No. 08/893,839 filed Jul. 11, 1997. |