Number | Date | Country | Kind |
---|---|---|---|
8011384 | Apr 1980 | GBX |
Number | Name | Date | Kind |
---|---|---|---|
1516132 | Allen | Nov 1924 | |
1930006 | Fox | Oct 1933 | |
3103488 | Griffin | Sep 1963 | |
3567629 | Ayers | Mar 1971 | |
3642615 | Wieferig | Feb 1972 | |
3892659 | Kirk | Jul 1975 | |
3979293 | Boulenger | Sep 1976 | |
4092249 | La Gatta | May 1978 | |
4100071 | Beurer | Jul 1978 | |
4207180 | Chang | Jun 1980 | |
4253949 | Hines | Mar 1981 | |
4278546 | Roesler | Jul 1981 | |
4297217 | Hines et al. | Oct 1981 | |
4304665 | Hines | Dec 1981 |
Number | Date | Country |
---|---|---|
104280 | Mar 1974 | DDX |
1025771 | Apr 1966 | GBX |
1473665 | May 1977 | GBX |
Entry |
---|
Breakthrough in Sewage Treatment", Water Services, Apr. 1975, 132, 140. |