Number | Date | Country | Kind |
---|---|---|---|
1-159733 | Jun 1989 | JPX |
Number | Date | Country |
---|---|---|
63-68248 | Mar 1988 | JPX |
63-19258 | Apr 1988 | JPX |
1-133651 | May 1989 | JPX |
Entry |
---|
Patent Abstracts of Japan, vol. 13, No. 258 (M-838) [3606], Jun. 15, 1989. |
Patent Abstracts of Japan, vol. 13, No. 380 (M863) [3728], Aug. 23, 1989. |
Patent Abstracts of Japan, vol. 12, No. 376 (M-750) [3223], Oct. 7, 1988. |
European Search Report EP 90 11 1663. |