Number | Date | Country | Kind |
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9819283 | Sep 1998 | GB |
Number | Name | Date | Kind |
---|---|---|---|
3912539 | Magee | Oct 1975 | A |
4481378 | Lesk | Nov 1984 | A |
4638109 | Ishihara et al. | Jan 1987 | A |
4759803 | Cohen | Jul 1988 | A |
Number | Date | Country |
---|---|---|
0369666 | May 1990 | EP |
0535614 | Apr 1996 | EP |
2216337 | Oct 1988 | GB |
2206732 | Jan 1989 | GB |
2208036 | Feb 1989 | GB |
WO 8905521 | Jun 1989 | WO |
Entry |
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Patent Abstract/Japan; vol. 9, No. 81 (E307) & JP 59021427-A. |