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| 5332305 | Slivon et al. | Jul 1994 | A |
| D356703 | Dickinson | Mar 1995 | S |
| 5482162 | Dickinson | Jan 1996 | A |
| D396578 | Zaidman | Aug 1998 | S |
| 5857757 | Bieker et al. | Jan 1999 | A |
| RE36379 | Slivon et al. | Nov 1999 | E |
| D430426 | Bieker et al. | Sep 2000 | S |
| D587047 | Kalkwarf | Feb 2009 | S |