| Number | Date | Country | Kind |
|---|---|---|---|
| 1-145959 | Jun 1989 | JPX |
| Number | Name | Date | Kind |
|---|---|---|---|
| 4432020 | Onose et al. | Feb 1984 | |
| 4646160 | Iizuka et al. | Feb 1987 | |
| 4741021 | Kotani et al. | Apr 1988 |
| Number | Date | Country |
|---|---|---|
| 61-230565 | Oct 1986 | JPX |
| Entry |
|---|
| English language abstract of Japanese Examined Patent Publication No. 230565/1986. |