Number | Date | Country | Kind |
---|---|---|---|
4-128261 | Apr 1992 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
3873870 | Fukushima et al. | Mar 1975 | |
4896149 | Buzak et al. | Jan 1990 | |
5077553 | Buzak | Dec 1991 | |
5214521 | Kwon et al. | May 1993 | |
5221979 | Kim | Jun 1993 | |
5272472 | Buzak | Dec 1993 | |
5276384 | Martin | Jan 1994 |
Entry |
---|
Patent Abstracts of Japan JP63-232243-Jan. 1989. |