| Patents for C02F 7 - Aeration of stretches of water (3,263) |
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| 06/23/2004 | EP1431252A2 Filter element for a clarification device for biological water treatment |
| 06/23/2004 | CN1506321A Heterotropic flow bioaeration technique and apparatus |
| 06/17/2004 | US20040112813 Purifying device |
| 06/10/2004 | WO2004048777A2 Method and apparatus for circulating fluids in a body of liquid |
| 06/09/2004 | CN1502572A Corrosion-resisting light aeratino rotary disk and its preparation method |
| 06/09/2004 | CN1502571A Rotary disk type sewage treatment aerating apparatus |
| 06/09/2004 | CN1502570A Aerobic process waste water or sewage treatment aeration tank |
| 06/09/2004 | CN1152735C Equipment for agitating liquid in reactor and at same time jetting gas into said liquid |
| 05/27/2004 | US20040099315 Method and apparatus for circulating fluids in a body of liquid |
| 05/26/2004 | CN1498866A Aeration method and aerator |
| 05/19/2004 | CN2616531Y Sewage treatment middle-water reuse aeration tank aeration apparatus |
| 04/28/2004 | CN2613480Y 涡轮溶氧机 DO turbo machine |
| 04/28/2004 | CN1491906A Method and device for purifying water by self solidifying technology with microbe and carrier in river |
| 04/22/2004 | US20040074829 Apparatus and method for improving water quality of reservoir |
| 04/21/2004 | EP1409420A1 Device for aerating natural and artificial waters, containers, tanks and basins |
| 04/21/2004 | CN1490258A Method for inhibiting pollutant releasement in water body |
| 04/07/2004 | CN1486943A Jetting Roots aeration machine |
| 03/31/2004 | EP1403221A2 Water purifier |
| 03/31/2004 | EP1401774A1 Method of controlling contaminant flow into water reservoir |
| 03/31/2004 | EP1337477A4 Improved aerator and mixer |
| 03/31/2004 | CN1485284A Needle brush aerator |
| 03/31/2004 | CN1143830C Sewage treating pool with deep aeration |
| 03/24/2004 | CN2607367Y Reinforced micro porous high-molecular polymer pipe-type aerator |
| 03/09/2004 | US6702263 Diffuser saddle connection |
| 03/03/2004 | CN1479697A 净化装置 Purification devices |
| 02/18/2004 | CN1138709C Purifying technology for micro polluted water source |
| 02/12/2004 | DE19704692B4 Reinigungsverfahren und Reinigungssystem für Seen und Sümpfe Cleaning methods and cleaning system for lakes and marshes |
| 02/11/2004 | CN2603233Y Pressure fan for water body aeration |
| 02/10/2004 | US6689262 Microbubbles of oxygen |
| 02/04/2004 | CN2602020Y Small drop height pattern low energy consumption efflux bleeding aerator |
| 02/04/2004 | CN1137059C Wind-driven combined aerator for treating sewage |
| 01/29/2004 | US20040017016 Aerator and mixer |
| 01/14/2004 | CN2599001Y Hydraulic automatic reverse flushing control circulating aeration filter |
| 01/14/2004 | CN2599000Y Lifting type water oxygenation circulation promoting device |
| 01/14/2004 | CN2598999Y Mixed stirring underwater aerator |
| 01/14/2004 | CN2598996Y Multiple nest type circulation flow aeration tower |
| 01/13/2004 | US6676837 Solar aeration system |
| 01/07/2004 | EP1377362A1 Floating paddlewheel aerator |
| 01/07/2004 | CN2597473Y Gas and water mixer for aerator |
| 01/07/2004 | CN2597472Y Gas and water flow guiding device for aerator |
| 01/07/2004 | CN2597458Y Jet sewage treater |
| 12/24/2003 | CN2594263Y Submersible aeration machines |
| 12/18/2003 | WO2003104651A1 Aerating wheel |
| 12/17/2003 | CN2592637Y Microcirculation slow-release aerator |
| 12/17/2003 | CN1131177C Flow-mixing oxygen-enriching precess for treating sewage |
| 12/10/2003 | CN2591294Y Guiding distributor |
| 12/10/2003 | CN2591032Y Aerator turbine |
| 12/10/2003 | CN2591031Y Water surface jet-flow aerator |
| 12/03/2003 | CN2589475Y New style sewage aerator |
| 12/03/2003 | CN1459425A Water cleaner for enclosed water area |
| 11/26/2003 | CN2587858Y Sewage aerator |
| 10/29/2003 | CN2583094Y Valve inside type aerator |
| 10/23/2003 | WO2003086988A1 Method for treating bodies of water or the sediments thereof |
| 10/23/2003 | DE20311510U1 Static water oxygenation plant has wind-driven turbine wheel discharging air through blade trailing edges |
| 10/22/2003 | CN2581439Y Micro-power consumption sewage treater |
| 10/22/2003 | CN2581438Y Aerator |
| 10/22/2003 | CN2581436Y Aerating disc for disc type meter aerator |
| 10/15/2003 | CN1124234C Straw pulp papermaking sewage treating process |
| 10/08/2003 | EP1349814A1 Apparatus and method for improving water quality of reservoir |
| 10/08/2003 | CN2578325Y Aeration rotating disk |
| 10/01/2003 | CN2576708Y Batterfly streamline impeller |
| 10/01/2003 | CN1445180A Device for distributing vertical hogged bubbles underwater |
| 10/01/2003 | CN1445179A Vertical aeration working head underwater |
| 10/01/2003 | CN1445178A Horizontal aeration working head underwater |
| 10/01/2003 | CN1445177A Device for distributing horizontal hogged bubbles underwater |
| 09/17/2003 | CN2573488Y Horizontal aerator |
| 09/17/2003 | CN2573487Y Aeration rotary disk |
| 09/11/2003 | DE20310555U1 Static mixer for gas and liquid has upright pipe holding liquid with base pipe feed of gas to upright helical corrugated full-width strip |
| 09/10/2003 | CN2571748Y Vacuum microbubble aeraator |
| 09/10/2003 | CN2571747Y Submerged pressure booster aerator for water treatment |
| 09/04/2003 | WO2003072507A1 Microbubbles of oxygen |
| 09/04/2003 | US20030164306 Microbubbles of oxygen |
| 09/04/2003 | CA2476576A1 Microbubbles of oxygen |
| 09/03/2003 | CN2570264Y Microporous flexible sheet hose aeration equipment |
| 09/03/2003 | CN1439610A Energy-saving oxygenation system in sewage treatment |
| 08/27/2003 | EP1337477A1 Improved aerator and mixer |
| 08/27/2003 | CN2568638Y Water area purifying aeration appts. |
| 08/27/2003 | CN2568637Y Host rack |
| 08/20/2003 | CN1118435C 水处理装置 Water treatment plant |
| 08/13/2003 | CN2565815Y Pond water circulation aerator |
| 08/13/2003 | CN2565814Y Single blade push flow type low noise energy saving of aeration machine |
| 08/06/2003 | CN2564566Y Aerator |
| 08/06/2003 | CN2564565Y Improved pipe-type membrane aerator |
| 08/06/2003 | CN2564564Y Porous aerator |
| 07/31/2003 | WO2003061814A1 Diffuser and an aeration apparatus equipped with such a diffuser |
| 07/30/2003 | CN2563151Y Under water aerator |
| 07/29/2003 | US6599426 High dissolved oxygen mixer-digester method |
| 07/23/2003 | CN2561790Y Sewage aerating apparatus |
| 07/23/2003 | CN1431927A Fine air bubble generator and fine air bubble generating device with generator |
| 07/16/2003 | CN2560637Y Dynamic air-diffusing aeration apparatus |
| 07/10/2003 | US20030127754 Wave generator with oxygen injection for treatment of a body of fluid |
| 07/09/2003 | CN2559644Y Ring ball table type microhole aerator |
| 07/09/2003 | CN2559643Y Efficient axial-flow automatic aerator |
| 07/09/2003 | CN2559642Y Axial-flow aerator |
| 07/02/2003 | CN2558652Y Microhole pipe type aerator for sewage treatment |
| 06/25/2003 | CN2557520Y Plane board type microporous aerator |
| 05/28/2003 | CN2552917Y High dissolved-oxygen aerator |
| 05/28/2003 | CN1109657C Two-propeller aerator for ship |
| 05/14/2003 | EP1165449B1 Mixing, aeration or oxygenating method and apparatus |
| 05/14/2003 | CN2550361Y Micro porous aerator |