| Patents for C02F 7 - Aeration of stretches of water (3,263) |
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| 04/19/2000 | CN1250682A Equipment for agitating liquid in reactor and at same time jetting gas into said liquid |
| 04/05/2000 | CN1249277A Sewage treating pool with deep aeration |
| 03/30/2000 | DE19843840A1 Lightweight floating pump suitable for land irrigation, fish farming, quarry and civil engineering pumping operations |
| 03/28/2000 | US6041738 Fish pond methods and systems |
| 03/15/2000 | CN2368839Y Rotary aeration sewage treating apparatus |
| 03/14/2000 | US6036357 Submarine-type liquid mixer |
| 03/08/2000 | CN2367606Y Water purifying apparatus for closed water area |
| 03/08/2000 | CN1050110C Oxygen-gathering activated aerator |
| 03/07/2000 | US6033562 Apparatus for aerating wastewater from pressurized or gravity flow sources |
| 02/29/2000 | US6029955 Counterbalanced dual submarine-type liquid mixer pairs |
| 02/24/2000 | WO2000009821A1 Water circulation |
| 02/23/2000 | CN2364683Y Efficient aeration pump |
| 02/10/2000 | WO2000006504A1 Clean water system and its structure |
| 01/25/2000 | US6017020 System and method for diffusing gas bubbles into a body of water |
| 12/29/1999 | CN2356029Y Polyoxygen activation aeration oxygen automatic aerator |
| 12/23/1999 | WO1999065829A1 Aerated pond wastewater treatment system and process |
| 12/23/1999 | CA2335697A1 Aerated pond wastewater treatment system and process |
| 12/22/1999 | CN2354361Y Underwater impeller aerator |
| 11/24/1999 | EP0959048A1 Purification method by mixing/diffusion of closed water zone and mixing/diffusion apparatus |
| 11/24/1999 | EP0959046A1 Apparatus for purification of water area |
| 10/27/1999 | CN2345538Y Device for oxygenation and water purification |
| 10/27/1999 | CN1232794A Straw pulp papermaking sewage treating process |
| 10/13/1999 | CN2343164Y Air water emulsifying-type forced aerator |
| 10/06/1999 | EP0947471A1 Aerating device for water and method for manufacturing an aerator |
| 09/30/1999 | WO1999048818A1 Method and pump for impelling water in waters |
| 09/30/1999 | CA2326112A1 Method and pump for impelling water in waters |
| 09/08/1999 | CN2337140Y Underwater turbine aerator |
| 08/26/1999 | WO1999042205A1 Submarine-type liquid mixer |
| 08/17/1999 | US5938983 Aeration device |
| 08/05/1999 | WO1999038813A1 Aerators |
| 07/28/1999 | EP0931764A2 Floating water purification free-running apparatus and water purification method |
| 07/15/1999 | DE19801238A1 Aerator for open waters is simpler than fixed aeration systems |
| 06/10/1999 | DE19754478A1 Wind-powered water oxygenation apparatus for standing inland waters |
| 04/28/1999 | CN2316314Y Batch-type biochemical treater |
| 04/13/1999 | US5893978 Purifying method and purification system for lakes and marshes |
| 04/07/1999 | CN2312927Y Aeration barrel for oxygenating agitating device |
| 03/23/1999 | US5885466 Rendering well water potable by flowing water through down draft aerator tube vertically positioned within water holding tank |
| 03/17/1999 | CN1210815A Purifying apparatus for water area |
| 02/25/1999 | WO1999008967A1 Apparatus for purification of water area |
| 02/09/1999 | US5868091 Float mounted aerator having a work deck |
| 01/07/1999 | DE19727275A1 Eliminating toxic sulphide containing cellulose waste sludge in stagnant waters |
| 12/16/1998 | CN1202145A Device for adding oxygen to water |
| 12/10/1998 | DE19722261A1 Water treatment assembly |
| 10/28/1998 | EP0873278A1 Device for adding oxygen to water |
| 10/16/1998 | CA2202798A1 Lake water mixer |
| 10/14/1998 | EP0870733A1 Aerator for liquids |
| 10/14/1998 | CN2294254Y Water wheel like for aeration |
| 10/07/1998 | CN2293562Y Perforated pipe aeration apparatus |
| 09/30/1998 | EP0802888A4 Aeration system and method |
| 09/30/1998 | EP0625961B1 Effluent treatment process |
| 09/01/1998 | US5799440 Floating island with water-purifying effect, plant-cultivation bag and method for purifying water |
| 07/30/1998 | WO1998032704A1 Method and device for airing waste water from power plants |
| 07/22/1998 | EP0854295A1 Sterilisation apparatus using ozone for raising water-zone |
| 07/22/1998 | CN1188082A Oxygen-gathering activated aerator |
| 06/18/1998 | DE19800684A1 Assembly comprising supported mat aeration system for treating open waters |
| 06/17/1998 | EP0847797A1 Method and apparatus for introducing a gas into waters |
| 06/04/1998 | WO1998023544A1 Method and apparatus for water treatment by addition of hydrogen peroxide |
| 05/26/1998 | US5756012 Gas dissolution |
| 05/26/1998 | US5755976 Pneumatic bubble aeration reactor and method of using same |
| 04/07/1998 | US5736049 Method and means for odor control in waste water lagoons |
| 03/26/1998 | DE19732789A1 Floating aerator having spray protection hood covering inlet and outlet |
| 03/04/1998 | EP0826640A2 A water oxygenating device |
| 01/25/1998 | CA2196630A1 Method and means for odor control in waste water lagoons |
| 01/22/1998 | WO1998002385A1 Purification method by mixing/diffusion of closed water zone and mixing/diffusion apparatus |
| 12/18/1997 | DE19639267C1 Biorotor for cleaning sewage and standing water |
| 12/18/1997 | DE19631696A1 Apparatus for enriching (waste) water with oxygen@-containing gas |
| 11/06/1997 | DE19704692A1 Purification of lake and marsh |
| 11/05/1997 | CN1163861A Purifying method and purification system for lakes and marshes |
| 10/29/1997 | EP0802888A1 Aeration system and method |
| 10/08/1997 | CN2264180Y Running-water ozone water jet mixing unit |
| 07/17/1997 | DE19539120C1 Underwater, rotary drum aerating and saturating of fluid |
| 07/09/1997 | CN1153746A Aerator |
| 06/26/1997 | WO1997022562A1 An aeration device |
| 05/22/1997 | WO1997018168A1 Device for adding oxygen to water |
| 05/22/1997 | CA2240152A1 Device for adding oxygen to water |
| 05/14/1997 | CN1149558A High-efficiency and high-energy saving oxygen enriching machine for water |
| 05/07/1997 | EP0771587A1 Gas dissolution |
| 05/01/1997 | CA2188732A1 Gas dissolution |
| 04/29/1997 | US5624574 Chlorinator-filter process for sewage treatment |
| 03/13/1997 | DE19533370A1 Process and assembly mineralise entire sludge load in eutrophic surface waters |
| 01/03/1997 | WO1997000123A1 Dual aeration and cooling system |
| 12/24/1996 | US5587113 Device for the treatment of polluted water |
| 12/18/1996 | CN2242887Y Combined air-diffused aerator |
| 11/26/1996 | CA2034086C Floating aerator arrangement |
| 10/30/1996 | CN2238536Y Whole-position delivery dish type dissolved oxygen machine |
| 10/29/1996 | US5569416 Apparatus for aerating fish ponds and lakes |
| 10/16/1996 | EP0737418A2 Floating island with water-purifying effect, plant-cultivation bag and method for purifying water |
| 10/15/1996 | US5565096 Natural filter for ecological system |
| 09/25/1996 | EP0733024A1 Regenerator for oxidation and cleaning of a liquid |
| 09/25/1996 | CN2235713Y Semi-submersible flow-control oxygen aerator |
| 09/18/1996 | EP0732307A2 A reinforced concrete bridge for waste water treatment basins or ditches |
| 09/18/1996 | CN1131129A High efficient energy-saving aerator in water |
| 08/27/1996 | US5549828 Oxygenating polluted water in upper portion of submerged chamber having top open to ambient air, flowing through self-cleaning biofilter on bottom of chamber, injecting air into lower portion so rising bubbles further aerate water |
| 08/08/1996 | DE19503450A1 Floating water treatment appliance with drive |
| 08/06/1996 | US5543089 Device for aeration of polluted water |
| 07/31/1996 | CN1127727A 水处理装置 Water treatment plant |
| 07/03/1996 | CN2230316Y Oxidation slotted-disk-type aeration device |
| 05/15/1996 | CN2226816Y Angling rod reel |
| 05/09/1996 | DE19539823A1 Device to re-establish biological equilibrium in body of water |
| 05/08/1996 | CN2226601Y Hanging type aeration oxygenator |