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D254519 | Kramer et al. | Mar 1980 | |
D280845 | Evert | Oct 1985 | |
D292140 | Cahill et al. | Oct 1987 | |
D300548 | Steger | Apr 1989 | |
D316472 | Flannagan | Apr 1991 | |
D332172 | Lewis | Jan 1993 | |
D352165 | Covertson | Nov 1994 | |
D352816 | Kirn et al. | Nov 1994 | |
3626530 | Ecklor et al. | Dec 1971 | |
3646626 | Frieder | Mar 1972 | |
4498882 | Evert | Feb 1985 | |
4578042 | Evert | Mar 1986 | |
4799908 | Lucius | Jan 1989 | |
4840591 | Dulin et al. | Jun 1989 | |
4871338 | Hoffman | Oct 1989 |