Number | Name | Date | Kind |
---|---|---|---|
D200132 | Sandin et al. | Jan 1965 | |
D200740 | Sundberg et al. | Mar 1965 | |
3035422 | Halbeisen | May 1962 | |
3277663 | Ulich | Oct 1966 | |
3320872 | Wegman | May 1967 | |
3323319 | Graser | Jun 1967 | |
3509697 | Dewey et al. | May 1970 | |
3592123 | Henken | Jul 1971 | |
3713376 | Ring | Jan 1973 | |
3820351 | Baker, Jr. | Jun 1977 | |
4011801 | Bruns | Mar 1977 |