Number | Name | Date | Kind |
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D57948 | Switzer | May 1921 | |
D205391 | Wittenmyer | Jul 1966 | |
D260383 | Debrauwer et al. | Aug 1981 | |
D263578 | Nyblom | Mar 1982 | |
D277468 | Nagayasu | Feb 1985 | |
D329031 | Lassan | Sep 1992 | |
D330179 | Graas | Oct 1992 | |
D339558 | Sulkowski | Sep 1993 | |
D340894 | Kobayashi | Nov 1993 | |
D350509 | Killian | Sep 1994 | |
D359715 | Anderson et al. | Jun 1995 | |
D361966 | Graas et al. | Sep 1995 | |
D368686 | Haas et al. | Apr 1996 | |
D386729 | Himuro | Nov 1997 | |
5580404 | Hitzky | Dec 1996 |