Number | Date | Country | Kind |
---|---|---|---|
7606904 | Jun 1976 | NLX |
Number | Name | Date | Kind |
---|---|---|---|
1399561 | Imhuff | Dec 1921 | |
2174203 | Ducellier et al. | Sep 1939 | |
2889929 | Kivell | Jun 1959 | |
3236384 | Sontheimer | Feb 1966 | |
3459659 | Bedker | Aug 1969 | |
3495711 | Englesson et al. | Feb 1970 | |
3617544 | Voss | Nov 1971 | |
4008153 | Mackrle et al. | Feb 1977 |
Number | Date | Country |
---|---|---|
233486 | May 1974 | ATX |
2728585 | Dec 1977 | DEX |
2030969 | Jun 1978 | DEX |
Entry |
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Toepassing van Methaangisting voor de Behandling van Minder Geconcentreerd Afvalwater, Lettinga and Velsen, H.sub.2 O, 1974, 7:281-289, Patent Office Rough Draft Translation of Toepassing van Methaangisting de Behandling van Minder Geconcentreerd Afvalwater. |