| Patents for E02B 13 - Irrigation ditches, i.e. gravity flow, open channel water distribution systems (1,251) |
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| 12/01/2005 | WO2005113900A1 Method for installing water resource recycling system |
| 12/01/2005 | US20050265787 Discharge control system for a reservoir |
| 11/26/2005 | CA2508293A1 Discharge control system for a reservoir |
| 11/24/2005 | US20050260039 Inlet collar for highway culverts |
| 11/23/2005 | CN1699697A Ecological interception canal system in farmland |
| 11/23/2005 | CN1228409C Fly ash synthesized channel joint impermeable material and its preparation method |
| 11/17/2005 | WO2005108681A2 An improved ditch liner system |
| 11/17/2005 | DE19619957B4 Rohre aus einer mit Polyurethanklebstoff gebundenen Feststoffschicht aus Quarzsand Pipes from a solid layer bonded with polyurethane glue from quartz sand |
| 11/10/2005 | US20050249555 Open or closed ended tire pipe apparatus and method |
| 11/08/2005 | US6962464 Method for constructing a water resource recycling system |
| 10/27/2005 | US20050238432 A method for constructing a water resource recycling system |
| 10/11/2005 | US6953156 Irrigation method for sloping land |
| 10/06/2005 | DE102005006653A1 Elektrischer Verbindungskasten für ein Fahrzeug und Verfahren zum Montieren desselben Of the same electrical junction box for a vehicle and method for mounting |
| 09/29/2005 | WO2005090928A1 Loss detection system for open channel networks |
| 09/28/2005 | CN1673462A Water-snail eradication method and tank for culvert and sluice and channel water delivery engineering |
| 09/22/2005 | WO2005012660A8 Liquid control structure |
| 09/14/2005 | CN2725361Y Small reservoir valve gate device |
| 09/13/2005 | US6942425 Mitred grate and drain cover |
| 08/25/2005 | US20050186031 Interlockable drainage system |
| 08/18/2005 | US20050178576 Automotive electrical connection box and a method of mounting it |
| 08/16/2005 | US6929241 Hydraulic valve and a liquid flow system |
| 08/04/2005 | US20050169710 Containment system |
| 07/20/2005 | CN2711308Y Machine for automatically distributing concrete onto slope of irrigation ditch |
| 07/14/2005 | WO2005064087A1 Block structure for gutter, water channel formed of block structure for the gutter, and method of manufacturing block the structure for gutter |
| 07/14/2005 | CA2550949A1 Block structure for gutter, water channel formed of block structure for the gutter, and method of manufacturing block the structure for gutter |
| 06/16/2005 | US20050129463 Irrigation gate system |
| 06/15/2005 | CN2704612Y Automatic pipeline billow irrigating controller |
| 06/08/2005 | CN2703801Y Water-retaining covering board |
| 06/08/2005 | CN1623366A Drought resisting device used for hole planting crops product |
| 05/19/2005 | CA2488047A1 Irrigation gate system |
| 05/19/2005 | CA2450151A1 Irrigation gate system |
| 05/11/2005 | EP1311728A4 Control gates |
| 05/04/2005 | CN1200173C Hilly region irrigation ditch concrete injection seepage-controlling and reinforcing technique |
| 05/03/2005 | US6886588 Buoyancy flushing apparatus and method thereof |
| 04/27/2005 | CN2695479Y Equipment for measuring water quantity for irrigating agricultural field |
| 04/26/2005 | US6884001 Farm pond sediment diverter |
| 04/20/2005 | EP1524370A1 Sequenced waste water feeder for use in waste water treatment plants |
| 04/13/2005 | CN2692265Y Irrigation ditch slope concrete automatic vilbro shaping machine |
| 03/30/2005 | CN2688751Y Sealing up belt for feathered channel seam |
| 03/23/2005 | CN1598162A Method for preventing leakage canal by rice chaff ash |
| 03/23/2005 | CN1598161A Cover for canal, land groove |
| 03/09/2005 | CN2683700Y Canal seepage-proof plastic film laying machine |
| 03/09/2005 | CN1590652A Ball valve for water conservancy engineering supplying and discharging water |
| 02/16/2005 | CN2679240Y Joint watertight tape for channel |
| 02/10/2005 | WO2005012660A1 Liquid control structure |
| 02/03/2005 | US20050025573 Liquid control structure |
| 01/19/2005 | CN2672152Y Channel and floor slot cover plate |
| 01/19/2005 | CN1566537A Method for making thin film dam reservoir (pool) |
| 01/13/2005 | US20050008435 Polypipe water flow control choker gate |
| 01/12/2005 | CN2670440Y Automatic water gate |
| 01/12/2005 | CN2669582Y IC card type motor-pumped well irrigating controller |
| 01/12/2005 | CN1563598A Operating device for theftproof water gate |
| 12/29/2004 | CN1558043A Canal seepage preventing plastic film laying machine |
| 12/22/2004 | CN2665209Y An anti-theft water gate control device |
| 12/15/2004 | CN2663513Y Orifice cable filling type outflow switching device |
| 11/24/2004 | CN1177107C 水道管 Water pipe |
| 11/17/2004 | CN1546798A Channel joint leakage prevention construction method |
| 11/17/2004 | CN1546592A Coal ash synthesized channel joint impermeable material and its preparation method |
| 11/10/2004 | CN1544759A Rolling dam equipment |
| 10/21/2004 | US20040208703 Drip berm having hydrophobic and hydrocarbon retentive properties |
| 10/21/2004 | US20040208698 Drip berm having hydrophobic and hydrocarbon retentive properties |
| 10/20/2004 | CN1172070C Special construction method for large thin-wall concrete prestress liquid flume |
| 10/14/2004 | US20040202510 Ditch liner system |
| 10/06/2004 | CN2646209Y Flashboard gate valve for ditch |
| 10/06/2004 | CN1169422C Sucking irrigation method with mulching under soil |
| 09/29/2004 | CN2644504Y Ditch sheet material |
| 09/08/2004 | CN2639356Y Rotation irrigation and drainage device |
| 08/25/2004 | EP1410116A4 Fluid regulation |
| 08/12/2004 | US20040156681 Fluid regulation |
| 08/11/2004 | CN2632146Y Multifunctional pressure-regulating and water dividing controller |
| 07/21/2004 | CN2627060Y Hydraulic sluice |
| 07/14/2004 | CN2625445Y Multifunctional water dividing regulating device |
| 06/30/2004 | CN1509426A Fluid regultion |
| 06/24/2004 | WO2004053235A1 Apparatus and method for transporting water |
| 06/24/2004 | CA2509646A1 Apparatus and method for transporting water |
| 06/17/2004 | US20040115001 Apparatus and method for transporting water with liner |
| 06/17/2004 | US20040111794 Buoyancy flushing apparatus and method thereof |
| 05/26/2004 | CN2617820Y Irrigation constructing materials |
| 05/19/2004 | DE10212506B4 Ventil, insbesondere Spülventil Valve, in particular flush valve |
| 05/05/2004 | CN2614224Y Water channel and diffluence ditch member for irrigation |
| 04/21/2004 | EP1410116A1 Fluid regulation |
| 04/21/2004 | CN2612723Y Screw type headstock gear bending-proof apparatus |
| 04/20/2004 | US6722818 Ditch liner system |
| 04/14/2004 | CN1488817A Hilly region irrigation ditch concrete injection seepage-controlling and reinforcing technique |
| 04/01/2004 | WO2004027175A1 Buoyancy flushing apparatus and method of flushing |
| 03/30/2004 | CA2252286C Reversible interlocking field drain panel |
| 03/17/2004 | CN1482304A Method of laying, welding and construction of canal seepage proof film |
| 03/17/2004 | CA2403610A1 Buoyancy flushing apparatus and method thereof |
| 03/03/2004 | CN2605303Y Improved wate gate for irrigation |
| 02/17/2004 | US6692186 Apparatus and method for transporting water |
| 02/11/2004 | CN2603114Y Leakage-resisting building block for irrigation channel |
| 02/04/2004 | CN1472395A 水道管 Water pipe |
| 01/22/2004 | US20040012101 Liquids dumping device |
| 01/15/2004 | US20040009041 Control gates |
| 01/07/2004 | CN1466643A Control gates |
| 01/06/2004 | CA2237072C Method and apparatus for forming a trench |
| 12/24/2003 | CN1131664C 水田水位调节装置 Paddy water level adjustment device |
| 12/03/2003 | CN2589512Y Valveless water discharging apparatus |
| 11/19/2003 | CN1128266C Water permeating and accumulating method with channel bottom connected to well |
| 11/13/2003 | US20030210955 Mitred grate and drain cover |