Number | Date | Country | Kind |
---|---|---|---|
63-318747 | Dec 1988 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
3769085 | Matsubara | Oct 1973 | |
4400580 | Yamanouchi et al. | Aug 1983 | |
4588855 | Kutsuwa et al. | May 1986 | |
4857232 | Burns, Jr. | Aug 1989 |
Number | Date | Country |
---|---|---|
0029709 | Sep 1979 | JPX |
0030111 | Sep 1979 | JPX |
1424296 | Feb 1976 | GBX |
2187589 | Sep 1987 | GBX |
Entry |
---|
Central Patent Index, Japanese Patent Abstracts, Unexamined, Derwent, London J 49015741 DW 7437 and JP-A-49-15 741 (Hitachi). |