| Patents for E02B 13 - Irrigation ditches, i.e. gravity flow, open channel water distribution systems (1,251) |
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| 04/13/2010 | US7695216 Mitred grate and drain cover |
| 03/31/2010 | CN201433387Y Canal lock containing guide screw |
| 03/31/2010 | CN201433384Y Ecological micro-seepage composite protective canal |
| 03/23/2010 | US7682103 Modular, self-contained, engineered irrigation landscape and flower bed panel |
| 03/16/2010 | US7677835 Drainage cell modular raintank and water storage system |
| 03/11/2010 | US20100061805 System and method for a curved conduit |
| 02/18/2010 | US20100040414 Thermal insulated sewer water treatment environment |
| 02/16/2010 | US7661904 Water conservation and distribution system |
| 02/10/2010 | CN201400887Y Comprehensive water conservancy system for farmland |
| 02/03/2010 | CN201395788Y Cone type sealed sluice gate |
| 02/03/2010 | CN201395787Y Sluice capable of adjusting water level of rice field |
| 01/26/2010 | US7651297 Catch basin having selectable port position |
| 01/19/2010 | US7647817 Loss detection system for open channel networks |
| 01/14/2010 | US20100006487 Drain inlet vault and method of assembly |
| 01/13/2010 | CN201382202Y Replaceable non-return water drain apparatus |
| 01/12/2010 | CA2360859C Flushing apparatus and method thereof |
| 01/07/2010 | WO2010001031A2 Automatic and rapid opening flush system for full-tank discharge |
| 01/06/2010 | CN101619570A Construction machine for casting underdrain on site by cement |
| 12/29/2009 | US7637692 Sealed well cellar |
| 12/29/2009 | US7637691 Multiple layer wall water storage chambers |
| 12/23/2009 | CN201367546Y Ecological gutter |
| 12/16/2009 | CN201362843Y Automatic water supplying gate for locating paddy fields |
| 12/10/2009 | US20090304449 Directional Microporous Diffuser And Directional Sparging |
| 12/09/2009 | CN201358464Y Steep thin-wall concrete lining machine |
| 12/09/2009 | CN201358450Y Stainless steel gate |
| 12/08/2009 | US7628566 Smooth interior water collection and storage assembly |
| 12/02/2009 | CN201354454Y Large section track-type U-shaped channel concrete lining machine |
| 11/26/2009 | US20090290936 Regenerative stormwater conveyance system and method |
| 11/19/2009 | WO2009137876A1 Flexible drainage cell |
| 11/19/2009 | CA2724556A1 Flexible drainage cell |
| 11/12/2009 | US20090279953 Modular underground water management systems |
| 11/11/2009 | CN201343724Y Anti-theft device for water and sluice |
| 11/10/2009 | US7614824 Control gates |
| 10/29/2009 | US20090269137 Tubular element with light weight aggregate filling |
| 10/21/2009 | CN101560757A Seepage-intercepting and pollutant-removing system of large channel non-water passing slope |
| 10/14/2009 | CN201326167Y Free double-sided reverse slap door |
| 10/07/2009 | CN101550687A Control gates |
| 09/30/2009 | CN201317933Y Irrigating aqueduct pipeline system |
| 09/10/2009 | US20090226260 Method and Apparatus for Capturing, Storing, and Distributing Storm Water |
| 09/09/2009 | EP2098641A2 Mouthpiece for discharge of water and regulation of the level thereof for rice fields and water basins in general |
| 09/08/2009 | US7585555 Synthetic-grass flooring and method for laying same |
| 09/08/2009 | US7585135 Marsh and wetland rehabilitation system and associated methods |
| 09/02/2009 | CN201301444Y Concrete flap gate for agricultural use |
| 08/26/2009 | CN201296921Y Ditch or trench vibrorammer |
| 08/19/2009 | CN101509246A Anti-seepage antifreezing spray finishing method of polyurethane polymeric material for channel |
| 08/18/2009 | US7575398 Automatic spotter with electronic control system for pile driving and continuous flight auger drilling leads |
| 08/12/2009 | CN201288321Y Assembled u-shaped channel |
| 08/05/2009 | CN201284476Y Anti-theft sluice gate opening and closing device |
| 07/16/2009 | US20090180834 Coupler for leaching chamber systems |
| 07/09/2009 | US20090175683 Underground Root Margin Even Irregation Apparatus and Method Thereof |
| 07/08/2009 | CN101476310A Free two-side turning door |
| 06/11/2009 | US20090148235 Transport Corridor infiltration system |
| 06/03/2009 | CN101446082A Construction method of building anti-permeability channel using soil curing agent |
| 05/27/2009 | CN201245833Y Combined type water-saving acequia |
| 05/27/2009 | CN100491648C Automatic-balancing controller of channel forming machine |
| 04/29/2009 | CN201228354Y Facilities for agricultural land storm drainage and drought control |
| 04/29/2009 | CN101418564A Stable water transfer channel |
| 04/21/2009 | US7520695 Water provisioning device |
| 04/16/2009 | WO2007113823A3 Water provisioning device |
| 04/01/2009 | CN201214782Y Steel combination water transmission and drain aqueduct |
| 04/01/2009 | CN100473785C Energy-saving ecological farm field irrigation drainage channel |
| 03/25/2009 | CN201212144Y Plastic film laying machine |
| 03/25/2009 | CN101392520A Water channel plastic tube system for irrigation |
| 03/19/2009 | US20090071070 Fertilization grate and trough system |
| 03/17/2009 | US7503725 Subsurface drainage system |
| 03/12/2009 | US20090067929 Leaching chamber with continuous curve arch and closely spaced corrugations |
| 03/10/2009 | US7502655 Methods for providing optimal light-CO2 combinations for plant production |
| 03/05/2009 | WO2009026646A1 Irrigation methods and systems |
| 03/04/2009 | CN201202851Y Cylinder type right side opening type self-closing flap valve |
| 03/04/2009 | CN201202850Y Cylinder type left side opening type self-closing flap valve |
| 02/26/2009 | US20090052990 Underground irrigation system |
| 02/25/2009 | CN201198568Y Compound desanding channel |
| 02/17/2009 | US7491017 Surface drainage system |
| 02/11/2009 | CN100460604C Crack-seam-free seepage-proof stable sweeled ground excavation dyke slope construction method |
| 01/28/2009 | CN201187049Y Stroke controllable portable motorized apparatus for changing sluice valve and valve pad |
| 01/27/2009 | CA2498974C Buoyancy flushing apparatus and method of flushing |
| 01/22/2009 | US20090022549 Obstruction Device for Flowing Waterways |
| 01/21/2009 | CN201183946Y Sealed type water channel shutter |
| 12/30/2008 | US7470085 Tightly peaked ditch liner system |
| 12/17/2008 | CN201166165Y Spherical shell type double-side opening self-closing flap valve |
| 12/17/2008 | CN201166164Y Spherical shell type left side opening self-closing flap valve |
| 12/17/2008 | CN201166163Y Spherical shell type right side opening self-closing flap valve |
| 12/11/2008 | US20080304908 Gutter Block Structure, Water Channel Formed by Gutter Block Structures, and Method of Manufacturing Gutter Block Structure |
| 12/09/2008 | US7461999 Flow measurement and control |
| 12/03/2008 | CN201159335Y Check drainer |
| 11/20/2008 | US20080286046 Modular, self-contained, engineered irrigation landscape and flower bed panel |
| 11/19/2008 | CN201151903Y Plastic-steel sluice |
| 11/12/2008 | CN201148612Y Water retaining apparatus |
| 11/12/2008 | CN101302753A Water channel in knap and building method thereof |
| 11/12/2008 | CN101302752A Method for building and managing water channel in knap area |
| 11/12/2008 | CN101300945A Orchard interlaced alternative irrigation method |
| 10/30/2008 | WO2008016410A3 Golf course turf conditioning control system and method |
| 10/22/2008 | CN101289844A Flow accelerating installation |
| 10/02/2008 | US20080237106 Subsurface drip disposal system |
| 09/23/2008 | US7428462 Method for managing water channel systems |
| 09/18/2008 | US20080226393 Irrigation & Drainage Pipe |
| 09/11/2008 | US20080219769 Root-irrigation pipe and root-irrigation system |
| 09/11/2008 | US20080219768 Foundation Watering System |
| 09/10/2008 | CN101260661A Automatic irrigation and drainage method and system for agricultural land |
| 09/03/2008 | CN101255683A Encapsulated penstock shutter |