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| D315350 | Ikeda | Mar 1991 | |
| D318473 | Miyashita et al. | Jul 1991 | |
| D331062 | Kanno | Nov 1992 | |
| D337119 | Taniguchi | Jul 1993 | |
| 4296829 | Pedersen | Oct 1981 | |
| 4335281 | Scott et al. | Jun 1982 | |
| 4564955 | Birch et al. | Jan 1986 | |
| 4588868 | Bertagna et al. | May 1986 | |
| 4617431 | Scott et al. | Oct 1986 | |
| 4634816 | O'Malley et al. | Jan 1987 | |
| 4677675 | Killion et al. | Jul 1987 | |
| 4720857 | Burris et al. | Jan 1988 | |
| 4742887 | Yamagishi | May 1988 | |
| 4893344 | Tragardh et al. | Jan 1990 | |
| 4917504 | Scott et al. | Apr 1990 | |
| 4979586 | Lazzevoni et al. | Dec 1990 |