| Number | Name | Date | Kind |
|---|---|---|---|
| 5625737 | Saito | Apr 1997 | A |
| 5765698 | Bullivant | Jun 1998 | A |
| 6044194 | Meyerhoefer | Mar 2000 | A |
| Number | Date | Country |
|---|---|---|
| 10-274359 | Oct 1998 | JP |
| 11-122758 | Apr 1999 | JP |
| Entry |
|---|
| Front and rear cover and pp. 109-117 and 140141 of Richco Inc. Catalog 25R, undated. |
| Application Ser. No. 09/810,935, filed Mar. 16, 2001. |