| Patents for E02B 13 - Irrigation ditches, i.e. gravity flow, open channel water distribution systems (1,251) |
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| 02/26/2014 | CN203452057U Automatic water discharging device |
| 02/26/2014 | CN103608523A The struggle against desertification |
| 02/12/2014 | CN103572741A U-shaped canal |
| 02/11/2014 | US8649910 Automatically adjusting irrigation controller |
| 01/29/2014 | CN203411962U Novel irrigation pipeline structure |
| 01/29/2014 | CN203411952U Concrete channel member |
| 01/28/2014 | US8636444 Fluid distribution system |
| 01/23/2014 | WO2014013493A1 Irrigation system especially suited for impermeable soils |
| 01/23/2014 | WO2013172677A3 Drain pipe for farmland and method for constructing agricultural waterway using same |
| 01/16/2014 | WO2014008553A1 Control gates and valves |
| 01/15/2014 | CN203393689U Water stopping gate of water channel of farmland |
| 01/08/2014 | CN203383198U Measurement and control integrated water diverting pipe valve |
| 01/01/2014 | CN102242543B Water conservancy system for preventing and treating soil secondary salinization in greenhouses in coastal region |
| 12/25/2013 | CN203361086U Ecologicalized farm irrigation system |
| 12/25/2013 | CN103466901A Ecological retention ditch system applicable to mixed rain and sewage treatment system in rural area |
| 12/25/2013 | CN103461070A Method and structure for rainwater harvesting and drought resisting in sloping fields of draught planting regions |
| 12/24/2013 | US8615379 Method for mutli-stage spatial sampling with multiple criteria |
| 12/18/2013 | CN103452075A Rice field and wetland water circulation system |
| 12/11/2013 | CN203334253U Ecological efficient irrigation canal system facility |
| 12/10/2013 | US8602681 Modular storm water infiltration apparatus |
| 12/04/2013 | CN203320499U Mortar plastering anti-cracking structure of irrigation channel |
| 12/04/2013 | CN103422472A U-shaped channel forming device and forming method |
| 11/28/2013 | WO2013177530A1 Conduit with connector and assembly thereof |
| 11/27/2013 | CN103410131A Automatic locking device of mountainous large-scale irrigation canal system gate |
| 11/27/2013 | CN102812843B Comprehensive matching technology for constructing road shelter forests in heavy saline-alkali soil sections of coastal areas |
| 11/20/2013 | CN103397692A Connecting method of plastic trenchs |
| 11/13/2013 | CN203284763U Pipeline for water conservancy project |
| 10/30/2013 | CN203256710U Gate valve for farmland drainage ditch |
| 10/30/2013 | CN103374904A Land-saving and water-saving technology for converting farmland drainage and irrigation patterns |
| 10/23/2013 | CN203247559U Engineering plastic field water inlet hole |
| 10/23/2013 | CN203247558U Sawtooth-shaped buckling pre-cast trapezoidal groove for farmland water conservancy channel |
| 10/16/2013 | CN102515354B Nitrogen phosphor interception undercurrent dam |
| 10/09/2013 | CN103343527A Measurement and control integrated water diversion farming door |
| 09/25/2013 | CN203213086U Concrete structured water channel with light steel formworks |
| 09/25/2013 | CN203213085U Saline and alkaline land greening salt elimination and soil moisture conservation waterscape constructing system |
| 09/25/2013 | CN103321197A Rice field sluice gate |
| 09/25/2013 | CN103321196A Water pumping irrigation and drainage system and irrigation and drainage method |
| 09/18/2013 | CN203200727U Combined type elastic water channel |
| 09/18/2013 | CN103306252A Ecological and efficient facility for irrigation channel of rice field |
| 09/11/2013 | CN203188189U Intelligent solar-powered automatic paddy field water level control gate |
| 09/11/2013 | CN203188188U Hanging bridge rice field water control gate |
| 09/11/2013 | CN103290819A Mortar plastering anti-cracking structure for irrigation canal |
| 09/04/2013 | CN101550687B Control gates |
| 08/28/2013 | CN203160216U Multifunctional earth port gate |
| 08/28/2013 | CN203160215U Small gate locking device |
| 08/27/2013 | US8516624 Artificial surfing facility |
| 08/21/2013 | CN203144989U Detachable irrigation ditch device easy to carry |
| 08/21/2013 | CN203144988U Concrete U-type irrigation canal |
| 08/14/2013 | CN203129110U Anti-collapse wetting ditch for dry farming of terrace |
| 08/08/2013 | US20130202358 Gully assembly |
| 08/07/2013 | CN203113299U Novel assembly type water delivery tank |
| 08/07/2013 | CN203113289U Liner used for channel |
| 08/07/2013 | CN103233449A Efficient ecological interception ditch suitable for dry land farmlands |
| 08/01/2013 | WO2013002527A9 Prefabricated drain structure |
| 08/01/2013 | WO2012044270A3 Grey water filtering system |
| 07/31/2013 | CN203096701U Agricultural channel gate |
| 07/24/2013 | CN203080497U Irrigation and drainage gate |
| 07/23/2013 | US8491224 Plastic detention chamber for stormwater runoff and related system and methods |
| 07/23/2013 | US8491223 Watering device, method for manufacturing said device, and means therefor |
| 07/17/2013 | CN203066045U Combined regulation and control gate for farmland water channel |
| 07/17/2013 | CN103205955A Amino polymer material and canal seepage control method based on amino polymer material |
| 07/16/2013 | CA2694067C Control gates |
| 07/10/2013 | CN103195028A Suspension-bridge-type rice field water control gate |
| 07/03/2013 | CN203034431U Spigot-and-socket precast ribbed concrete U-shaped channel member |
| 07/03/2013 | CN203034430U Earthwork standard room type ecological ditch |
| 06/26/2013 | CN203021976U Water pipeline |
| 06/12/2013 | CN202989887U Three-way irrigation ditch flow steering brake |
| 06/05/2013 | CN202969352U Flow steering valve |
| 06/05/2013 | CN202969351U Novel water channel |
| 06/05/2013 | CN102095004B Large-sized hydraulic speed change floating box flap valve |
| 05/29/2013 | CN202954351U Built-in soft control gate |
| 05/29/2013 | CN202954350U Improved water gate made of composite woods |
| 05/15/2013 | CN202936764U Automatic rainwater-triggered brake |
| 05/15/2013 | CN103104405A Novel technology for speeding up electricity generation of canal water turbines |
| 05/15/2013 | CN103103967A Irrigation and draining brake |
| 05/08/2013 | CN202925520U Filter desilting type U-shaped channel |
| 05/08/2013 | CN103086513A Ecological ditch for increasing utilization rates of N and P in farmland by controlling agricultural non-point source pollution |
| 04/24/2013 | CN202899106U Rice drain gate and matched connecting pipes thereof |
| 04/24/2013 | CN202899102U Multifunctional paddy field sluice valve |
| 04/24/2013 | CN102557253B Organism-strengthened pollution reducing ditch |
| 04/24/2013 | CN102392429B Headwork stratified water intaking method for Yellow River diversion irrigation district |
| 04/17/2013 | CN202881908U Lifting device gate not prone to fall-off in mid air |
| 04/17/2013 | CN202881907U Full-automatic water saving irrigation and drainage anti-permeability canal cast-in-situ molding machine |
| 04/17/2013 | CN103046514A Liner used for ditches |
| 04/17/2013 | CN101818492B Irrigation method for master and secondary channels of water distribution system |
| 04/10/2013 | CN202865810U Novel ditch system for tea garden |
| 04/09/2013 | US8414222 Riser assembly for water storage chambers |
| 04/03/2013 | CN202849998U Polymer composite canal |
| 03/21/2013 | US20130071186 Foundation Stabilization System and Method of Use |
| 03/20/2013 | CN202809574U Ditch gate for rice field |
| 03/13/2013 | CN202787198U Paddy field ecological irrigation and drainage district based on sustainable utilization |
| 03/13/2013 | CN102960141A Watercress planting field |
| 03/06/2013 | CN202767035U Manual operation on-and-off gate |
| 03/06/2013 | CN102953359A Method for constructing covered channel through efficient water-saving cast-in-place irrigation and drainage |
| 02/28/2013 | WO2013002527A3 Prefabricated drain structure |
| 02/28/2013 | US20130051916 Seamless, double walled sump |
| 02/27/2013 | CN202755356U Water inletting, water discharging and road integrated farm irrigation system |
| 02/21/2013 | WO2013025179A1 The struggle against desertification |
| 02/13/2013 | CN202730730U Detachable irrigation canal |
| 02/13/2013 | CN102026540B Flexible drainage cell |