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3715807 | Heffer | Feb 1973 | |
4535544 | Jones et al. | Aug 1985 | |
4813150 | Colvin | Mar 1989 | |
4910874 | Busch | Mar 1990 | |
4915088 | Powers | Apr 1990 | |
5025565 | Stenerson et al. | Jun 1991 | |
5040301 | Forbis | Aug 1991 | |
5131153 | Seales | Jul 1992 | |
5165178 | Seely | Nov 1992 | |
5220907 | Lonsdale | Jun 1993 | |
5255440 | Rogers | Oct 1993 | |
5379746 | Sappington | Jan 1995 | |
5413084 | Haggard | May 1995 | |
5425177 | Pacenti | Jun 1995 | |
5464003 | Sherman | Nov 1995 | |
5524351 | Pinson et al. | Jun 1996 | |
5671724 | Priebe | Sep 1997 | |
5802726 | Trosper, Jr. et al. | Sep 1998 |