Number | Date | Country | Kind |
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2000-015518 | Jan 2000 | JP | |
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4398399 | Itoh et al. | Aug 1983 | A |
6247330 | Ishikawa et al. | Jun 2001 | B1 |
Number | Date | Country |
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5-9001 | Jan 1993 | JP |
6-97127 | Nov 1994 | JP |
8-121911 | May 1996 | JP |
Entry |
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Patent Abstracts of Japan, vol. 008, No. 118 (C-226), May 31, 1984 and JP 59 032942 A (Hitachi Seisakusho KK), Feb. 22, 1984. |