| Number | Date | Country | Kind |
|---|---|---|---|
| 98/45345 | Oct 1998 | KR |
| Number | Name | Date | Kind |
|---|---|---|---|
| 4626892 | Nortrup | Dec 1986 | A |
| 5237417 | Hayashi | Aug 1993 | A |
| 5774187 | Tsunoda | Jun 1998 | A |
| Number | Date | Country |
|---|---|---|
| 7-15767 | Jan 1995 | JP |
| 7-312729 | Nov 1995 | JP |
| Entry |
|---|
| Korean Patent Office Action, dated Apr. 18, 2001. |