Number | Name | Date | Kind |
---|---|---|---|
4460336 | Smith et al. | Jul 1984 | |
4752221 | Idanson et al. | Jun 1988 | |
4838786 | Reher et al. | Jun 1989 | |
4948366 | Horn et al. | Aug 1990 |
Entry |
---|
Ormco Corporation, "Gem Brackets", 1987. |
Unitex Corporation, "Transcend Series 2000", 1990. |