| Patents for E02B 13 - Irrigation ditches, i.e. gravity flow, open channel water distribution systems (1,251) |
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| 11/04/2003 | US6640828 Flushing apparatus and method thereof |
| 10/15/2003 | CN2579955Y Slope protection plate |
| 10/15/2003 | CN1448047A Water management system for paddy field on hillside farm |
| 10/09/2003 | WO2003083224A1 Irrigation method and apparatus therefor |
| 10/08/2003 | CN1447901A Liquid dumping device |
| 10/01/2003 | CN1445416A Special construction method for large thin-wall concrete prestress liquid flume |
| 09/10/2003 | CN2571828Y U-shape water trough with assembling type joint |
| 09/04/2003 | WO2003072881A1 Device for lifting and distributing water from canal and river flows |
| 07/16/2003 | CN2560682Y Weir sluice valve |
| 07/09/2003 | EP0865541B1 Agricultural drip tape |
| 06/25/2003 | CN1425275A Water level regulator for paddy field |
| 06/25/2003 | CN1425274A Water level regulator for paddy field |
| 06/18/2003 | CN1111348C Water management system for paddy field on hillside farm |
| 06/12/2003 | DE10152445C1 Purge valve for cesspit or rainwater reservoir, has guide tube which pivots to let water out when at high level |
| 06/04/2003 | CN1421574A Automatically controlled surge irrigation system |
| 05/28/2003 | CN2553007Y Sluice valve for farmland |
| 05/22/2003 | US20030095837 Method of carrying out, and apparatus for use in, flood irrigation |
| 05/21/2003 | EP1311728A1 Control gates |
| 05/13/2003 | US6561225 Passive flow control valve |
| 05/08/2003 | US20030084939 Flushing apparatus and method thereof |
| 05/07/2003 | EP1015706B1 Apparatus for the distribution of water or other liquids |
| 05/02/2003 | EP1306494A2 Valve, in particular flush valve |
| 05/01/2003 | CA2360866A1 An apparatus for sequentially distributing liquid in more than one direction and method thereof |
| 04/29/2003 | US6554021 Apparatus for shock-like flushing in a liquid system |
| 04/15/2003 | US6547488 Greens maintenance system |
| 04/09/2003 | CN2543991Y Temp. expansion gap |
| 03/19/2003 | CN2540444Y Moving coiled-pipe type irrigation device |
| 03/12/2003 | CN2539775Y Environmental protection simple gate |
| 02/19/2003 | CN2536648Y Unitary prefabricated thermal insulative components for canal lining |
| 02/19/2003 | CN2536647Y Cement U-shape channel with taped end |
| 02/19/2003 | CN2536646Y Anti-penetrating canal with composite coated tiles |
| 02/06/2003 | US20030026659 Water gate opened and closed by oil pressure |
| 02/06/2003 | US20030026658 Manual light water gate |
| 01/22/2003 | CN2532117Y Flow-saving regulation controller for channel water |
| 01/08/2003 | CN2529912Y Combined beat door |
| 12/11/2002 | CN2525121Y Glass fiber reinforced plastic channel protective film |
| 12/04/2002 | CN2523792Y U-shape concrete channel lining with rib structure |
| 11/20/2002 | CN2521256Y Hollow plastic water channel |
| 10/16/2002 | CN2516598Y Multifunction pipeline |
| 10/16/2002 | CN2516597Y Ceramic guide device for vegetable irrigation |
| 09/12/2002 | WO2002071163A1 Fluid regulation |
| 09/04/2002 | CN2509229Y 农用水槽 Farm Sink |
| 08/29/2002 | US20020119007 Greens maintenance system |
| 08/28/2002 | CN2507913Y Precast element of concrete irrigation ditch |
| 08/08/2002 | US20020104573 Passive flow control valve |
| 08/07/2002 | CN1362012A Sucking irrigation method with mulching under soil |
| 08/06/2002 | US6427718 Automated farm turnout |
| 07/25/2002 | US20020096654 Hydraulic valve and a liquid flow system |
| 07/24/2002 | CN2501912Y Concrete gate |
| 06/26/2002 | CN2496920Y Automatic vibrated concrete lining machine of arc-bottom trapezoidal ditch |
| 06/25/2002 | US6409427 Soil erosion collector |
| 06/13/2002 | WO2002046535A1 Two-way gate valve for open channels |
| 06/06/2002 | WO2001098695A3 Liquids dumping device |
| 06/06/2002 | US20020066484 Automated farm turnout |
| 05/22/2002 | CN2492595Y Small impervious plastic canal |
| 05/15/2002 | CN2491484Y Automatic vibrated concrete lining machine for trapezoidal channel |
| 02/28/2002 | WO2002016698A1 Control gates |
| 02/28/2002 | CA2781640A1 Control gates |
| 02/28/2002 | CA2694067A1 Control gates |
| 02/27/2002 | CN2479063Y Water turning on-off device for pond, reservoir and water channel |
| 02/20/2002 | CN2477704Y Concrete slab plastic packed mould for anti-leakage canal |
| 02/13/2002 | CN1335747A A method and apparatus for flood irrigation |
| 01/23/2002 | CN1078282C Improved flood-proof drought-resistant canal-building method |
| 01/16/2002 | EP1170985A1 A method and apparatus for flood irrigation |
| 12/27/2001 | WO2001098695A2 Liquids dumping device |
| 12/19/2001 | CN1327109A Construction method for u-shaped channel |
| 11/21/2001 | CN2460557Y Channel for water distribution |
| 11/14/2001 | EP1153176A1 Apparatus for shock-like flushing in a liquid system |
| 11/07/2001 | EP1152090A1 Sliding valve system with and without operation mechanism, free of maintenance and made of plastic material |
| 10/10/2001 | EP1141494A1 Water conduit |
| 10/04/2001 | WO2000044999A9 Apparatus for shock-like flushing in a liquid system |
| 09/05/2001 | CN1311838A Porous medium in an integrated hydrologic circuit for water storage and water transport to minimize evaporative loss for farm use and city use |
| 08/29/2001 | CN1310269A Water permeating and accumulating method with channel bottom connected to well |
| 08/14/2001 | US6273640 Irrigation ditch liner |
| 06/20/2001 | EP1108097A1 Regulating device for continuous or sequential distribution of single liquids or mixtures |
| 06/20/2001 | EP1108096A1 Device for sequential flushing and for distributing liquid |
| 06/20/2001 | EP1107932A1 Device for flushing and distributing liquid |
| 06/13/2001 | CN2434339Y Lining of irrigation canal |
| 05/09/2001 | CN2429563Y Movable penetration-proof plastic channel for farmland |
| 04/17/2001 | US6216733 Apparatus for the distribution of water or other liquids |
| 04/04/2001 | CN2425951Y Large water-distribution station machine unit capable of using 220 v power source |
| 03/28/2001 | CN1063815C Structure of drainage channel |
| 03/21/2001 | CN1288091A Blockig water flow and storing dirt method |
| 11/28/2000 | US6152650 Wastewater and effluent distribution system |
| 11/22/2000 | CN1274032A Movable ditch for irrigation |
| 11/09/2000 | WO2000066843A1 Regulating device for continuous or sequential distribution of single liquids or mixtures |
| 11/09/2000 | WO2000066842A1 Device for sequential flushing and for distributing liquid |
| 11/09/2000 | WO2000066498A1 Device for flushing and distributing liquid |
| 10/17/2000 | US6132139 Water level regulating device for paddy field |
| 10/11/2000 | CN2400499Y Flood-diversion device for combating drought and draining waterlogged fields |
| 10/10/2000 | US6129482 Reversible interlocking field drain panel |
| 09/19/2000 | US6120210 Use of porous medium in an integrated hydrologic circuit for water storage and transport in land reclamation, agriculture, and urban consumptions |
| 09/06/2000 | CN2394957Y Prefabricated member for concrete channel |
| 08/31/2000 | WO2000049853A1 A method and apparatus for flood irrigation |
| 08/31/2000 | WO2000049852A1 A method and apparatus for flood irrigation |
| 08/31/2000 | CA2357006A1 A method and apparatus for flood irrigation |
| 08/29/2000 | US6109827 Method and system for flood irrigation |
| 08/09/2000 | CN2390916Y Prefabricated U shape groove |
| 08/03/2000 | WO2000044999A1 Apparatus for shock-like flushing in a liquid system |
| 07/13/2000 | WO2000040811A1 Water conduit |