Patent Grant
D421812
| Number | Name | Date | Kind |
|---|---|---|---|
| D175318 | Schmidt | Aug 1955 | |
| D218475 | Allyn | Aug 1970 | |
| D226908 | Jadlock | May 1973 | |
| D227298 | Bacevius | Jun 1973 | |
| D234803 | Baccevius | Apr 1975 | |
| D358224 | Burns | May 1995 | |
| 2385639 | Packer et al. | Sep 1945 | |
| 3175080 | Moore | Mar 1965 | |
| 3711699 | Bacevius | Jan 1973 | |
| 3794824 | Bacevius | Feb 1974 | |
| 4531178 | Uke | Jul 1985 | |
| 4703402 | Hsieh | Oct 1987 | |
| 4797794 | Connor et al. | Jan 1989 | |
| 5235157 | Blackburn | Aug 1993 | |
| 5373427 | McLean | Dec 1994 | |
| 5473521 | Minshall | Dec 1995 |
