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4521275 | Purdes | Jun 1985 | |
4581101 | Senoue et al. | Apr 1986 | |
4919748 | Bredbenner et al. | Apr 1990 | |
5573679 | Mitchell et al. | Nov 1996 | |
5661052 | Inoue et al. | Aug 1997 | |
5674787 | Zhao et al. | Oct 1997 | |
5700737 | Yu et al. | Dec 1997 | |
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Entry |
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