Number | Name | Date | Kind |
---|---|---|---|
1456955 | Wagner | May 1923 | |
2301424 | List et al. | Nov 1942 | |
3193713 | Larson et al. | Jul 1965 | |
3569791 | Vogel | Mar 1971 | |
3758843 | Ishizaki et al. | Sep 1973 | |
4182967 | Jordan | Jan 1980 | |
4200831 | Weldon et al. | Apr 1980 |
Entry |
---|
"Kleines Handbuch Technischer Regelvorgange", pp. 514, 515. |