Patent Grant
D329294
| Number | Name | Date | Kind |
|---|---|---|---|
| 2520109 | Rosenbaum | Aug 1959 | |
| 2597578 | Ganter | May 1952 | |
| 2674432 | Lorentzen | Apr 1954 | |
| 2698727 | Rutledge | Jan 1955 | |
| 2792999 | Lorentzen | May 1957 | |
| 4059914 | Dobson | Nov 1977 | |
| 4122884 | Salzmann | Oct 1978 | |
| 4224974 | Anderson et al. | Sep 1980 | |
| 4235406 | Vecchiarelli | Nov 1980 | |
| 4531563 | Nilsson | Jul 1985 | |
| 4607677 | Comeau | Aug 1986 | |
| 4653377 | Chen | Mar 1987 | |
| 4844139 | John | Jul 1989 |
