Number | Name | Date | Kind |
---|---|---|---|
3829154 | Becknell | Aug 1974 | A |
RE31746 | Dimmer et al. | Nov 1984 | E |
4484777 | Michel | Nov 1984 | A |
4505512 | Schmeichel et al. | Mar 1985 | A |
4529098 | Heider et al. | Jul 1985 | A |
4691957 | Ellingson | Sep 1987 | A |
5002328 | Michel | Mar 1991 | A |
5303972 | Heider et al. | Apr 1994 | A |
5487584 | Jespersen | Jan 1996 | A |
5658037 | Evans et al. | Aug 1997 | A |
5765901 | Wilkens | Jun 1998 | A |
5924758 | Dimmer et al. | Jul 1999 | A |
6199935 | Waltz et al. | Mar 2001 | B1 |
6206449 | Searfoss | Mar 2001 | B1 |
20020021018 | Royer | Feb 2002 | A1 |
20020084672 | Searfoss | Jul 2002 | A1 |
Number | Date | Country |
---|---|---|
1241982 | Jan 1984 | CA |
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