| Number | Name | Date | Kind |
|---|---|---|---|
| D219062 | Koziol | Oct 1970 | |
| 3364704 | Bernstein | Jan 1968 | |
| 4906181 | Ebner et al. | Mar 1990 | |
| 5547371 | Rose | Aug 1996 | |
| 5564918 | Lin | Oct 1996 |
| Entry |
|---|
| U.S. Patent Application Serial No. 08/876,871, filed Jun. 16, 1997; pp. 1-3, 7, 8 and 12; Figures 1 and 7. |