Number | Date | Country | Kind |
---|---|---|---|
3-134223 | Jun 1991 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
4202682 | Black | May 1980 | |
4253863 | Iyengar | Mar 1981 |
Number | Date | Country |
---|---|---|
100931 | Jun 1982 | JPX |
61-103433 | Jul 1986 | JPX |
162642 | Jul 1987 | JPX |
62-162643 | Jul 1987 | JPX |
62-171938 | Jul 1987 | JPX |
64-37443 | Mar 1989 | JPX |
Entry |
---|
Patent Abstracts of Japan vol. 12, No. 15 (C-469) (2862), 16 Jan. 1988 & JP-A-62 171 938 (Sumitomo Electric Ind. Ltd.) 28 Jul. 1987. |