Number | Date | Country | Kind |
---|---|---|---|
17971/79 | May 1979 | GBX |
Number | Name | Date | Kind |
---|---|---|---|
3642615 | Wieferig | Feb 1972 | |
3804255 | Speece | Apr 1974 | |
3878097 | Mochizuki et al. | Apr 1975 | |
3910838 | kaelin | Oct 1975 | |
4086160 | Roesler | Apr 1978 | |
4207180 | Chang | Jun 1980 | |
4253949 | Hines et al. | Mar 1981 |
Number | Date | Country |
---|---|---|
54-121565 | Sep 1979 | JPX |
7406507 | Nov 1974 | NLX |
Entry |
---|
Speece, "U-tube Stream Reaeration," Public Works Aug. 1969, pp. 111-113. |