Number | Name | Date | Kind |
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4993396 | Miura | Feb 1991 | |
5045964 | Bennett et al. | Sep 1991 | |
5571245 | Ooyabu et al. | Nov 1996 | |
5609145 | Kojima et al. | Mar 1997 | |
5623912 | Kelly | Apr 1997 |
Entry |
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"Patent Abstracts of Japan", vol. 14, No. 375 (M1010), Abstract of Jp-02-136563, Aug. 1990. |