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3426364 | Lumb | Feb 1969 | |
3848601 | Ma et al. | Nov 1974 | |
4820305 | Harms et al. | Apr 1989 | |
4877020 | Vich | Oct 1989 | |
5015247 | Michelson | May 1991 | |
5196014 | Lin | Mar 1993 | |
5261909 | Sutterlin et al. | Nov 1993 | |
5397364 | Kozak et al. | Mar 1995 |
Entry |
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Ser. No. 08/219,626 Mar., 1994 Michelson. |