| Patents for E02B 13 - Irrigation ditches, i.e. gravity flow, open channel water distribution systems (1,251) |
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| 04/25/2007 | CN2892962Y Rice field water-saving gate |
| 04/25/2007 | CN2892961Y Modified asphalt concrete precast lining board |
| 04/25/2007 | CN1952268A Control gates |
| 04/18/2007 | CN2890169Y Combined water tank cell |
| 04/18/2007 | CN2890168Y Closed water channel in mountain land |
| 04/11/2007 | CN1944823A Combined member specially for discharging and storaging water |
| 04/05/2007 | US20070077122 Leaching chamber having joint with access port |
| 03/29/2007 | US20070071555 Septic system |
| 03/28/2007 | CN1938567A Loss detection system for open channel networks |
| 03/21/2007 | CN1932164A Energy-saving ecological farm field irrigation drainage channel |
| 03/15/2007 | US20070059100 Underwater oil storage method and system |
| 03/14/2007 | CN2878505Y Portable weir dam groove |
| 03/14/2007 | CN2878504Y Automatic water draining apparatus |
| 03/08/2007 | US20070053746 Wastewater effluent shield |
| 03/07/2007 | CN2876179Y Premade composite ditch |
| 02/20/2007 | CA2149079C Screen scraper for trash racks |
| 02/15/2007 | WO2007018417A1 Quick-opening irrigation gate with variable flow control |
| 02/08/2007 | WO2006132790A3 Fluid conduit with layered and partial covering material thereon |
| 02/07/2007 | CN2866592Y Irrigation canals and ditches type wet land bed |
| 02/01/2007 | US20070025817 Water retention system |
| 01/24/2007 | CN2861275Y Modified concrete U type ditch |
| 01/24/2007 | CN1296566C Operating device for theftproof water gate |
| 01/23/2007 | US7165914 Ditch liner system |
| 01/17/2007 | CN1898443A Block structure for gutter, water channel formed of block structure for the gutter, and method of manufacturing block the structure for gutter |
| 01/09/2007 | US7160059 Adjustable angle coupler for leaching chamber systems |
| 01/02/2007 | US7156580 Interlockable drainage system |
| 12/21/2006 | US20060285926 Impulse-responsive rotary actuator for storm drain barrier not disabled by immersion |
| 12/20/2006 | EP1733191A1 Loss detection system for open channel networks |
| 12/20/2006 | CN2848939Y Square type biside door full automatic irrigation drainage and flood proof valve |
| 12/20/2006 | CN2848938Y Square type single side door full automatic irrigation drainage flood proof valve |
| 12/19/2006 | US7152001 Fluid regulation |
| 12/14/2006 | CA2609409A1 Fluid conduit with layered and partial covering material thereon |
| 12/13/2006 | CN2846496Y Automatic seam cutter for slope concrete |
| 12/13/2006 | CN2846495Y Diversion canal capable of crossing hill |
| 12/13/2006 | CN1289758C Canal seepage preventing plastic film laying machine |
| 12/07/2006 | US20060275083 Sediment control drain and method of construction |
| 11/29/2006 | CN2841764Y Elastic polyurethane joint lining plate |
| 11/28/2006 | CA2284215C On-site sewage treatment and disposal system |
| 11/22/2006 | CN1864469A Rainwater osmosis reversal root protection method |
| 11/21/2006 | US7137755 Underground water retention apparatus |
| 11/08/2006 | EP1170985A4 A method and apparatus for flood irrigation |
| 11/08/2006 | CN2835341Y 组合式涵管闸门 Combined culvert gates |
| 11/08/2006 | CN2835339Y Filling waterstop band |
| 11/01/2006 | CN2832911Y Plastic channel and related water measurement device |
| 10/26/2006 | WO2005108681A3 An improved ditch liner system |
| 10/19/2006 | US20060233612 Storm water retention chambers |
| 10/18/2006 | CN2828140Y Long slope vibration sliding formwork forming machine |
| 10/18/2006 | CN1280685C Fluid regultion |
| 10/18/2006 | CN1280488C Control gates |
| 10/11/2006 | CN2825740Y Concrete U-type trough with flange |
| 10/04/2006 | EP1707681A1 Block structure for gutter, water channel formed of block structure for the gutter, and method of manufacturing block the structure for gutter |
| 10/04/2006 | CN2823376Y Movable water tank |
| 10/04/2006 | CN1277462C Water level regulator for paddy field |
| 10/03/2006 | US7114878 Irrigation gate system |
| 09/20/2006 | CN1276154C Method for preventing leakage canal by rice chaff ash |
| 09/06/2006 | CN2813707Y Automatic locating supplying water sluice gate for rice field |
| 08/31/2006 | US20060192034 Orifice shield for drainage pipe |
| 08/24/2006 | US20060188337 Piping system with transition coupling |
| 08/23/2006 | CN1820578A Method for anti-drought afforestation by collecting water, preserving water and supplementing water |
| 08/17/2006 | US20060182497 Leaching system |
| 08/16/2006 | CN2806563Y Non-return drainage device for channel drainage system |
| 08/01/2006 | US7083359 Control gates |
| 07/05/2006 | CN2793156Y Automatic concrete cloth machine on channel slope |
| 06/29/2006 | DE10218766B4 Zu- oder Ablaufmönch zur wasserseitigen Bewirtschaftung Inlet or outlet monk for water-side management |
| 06/28/2006 | CN1793517A Fast building closed ditch on hilly region |
| 06/21/2006 | CN1789565A Long slope vibratory slipform shaping mill |
| 06/15/2006 | US20060127184 Aquifer recharge valve and method |
| 06/15/2006 | US20060127183 Golf course environmental management system |
| 06/14/2006 | CN2787724Y Concrete paving machine for trench and road |
| 05/30/2006 | US7052210 Inlet collar for highway culverts |
| 05/30/2006 | US7052208 Discharge control system for a reservoir |
| 05/23/2006 | US7048261 Liquids dumping device |
| 05/10/2006 | CN2778878Y Sealing strip for orifice |
| 04/25/2006 | US7033110 Drainage support matrix |
| 04/20/2006 | US20060083592 Control gates |
| 04/20/2006 | US20060083591 Method of forming surface seeded particulate |
| 04/13/2006 | US20060078386 Subsurface drainage system and drain structure therefor |
| 04/11/2006 | US7025532 Apparatus and method for transporting water with liner |
| 04/06/2006 | US20060072971 Apparatus and method for transporting water with liner |
| 04/04/2006 | US7021671 Septic tank drain field pipe manifold system and method of use |
| 03/16/2006 | US20060056915 Control gates |
| 03/14/2006 | US7011286 Bag valve |
| 03/09/2006 | US20060051161 Methods and apparatus for reducing sand erosion in golf course bunkers |
| 03/08/2006 | CN2763347Y Water level controllable automatic opened gate |
| 02/15/2006 | CN1242126C Channel joint leakage prevention construction method |
| 02/07/2006 | US6994490 Stormwater receiving device and assembly |
| 02/01/2006 | CN2755173Y Vibrating drum forming machine of lining apparatus |
| 02/01/2006 | CN1727578A Drainage sluice for water resource facilitiea |
| 02/01/2006 | CN1239071C Water level regulator for paddy field |
| 01/31/2006 | US6991402 Methods and modules for an underground assembly for storm water retention or detention |
| 01/24/2006 | US6988848 Drip berm having hydrophobic and hydrocarbon retentive properties |
| 01/12/2006 | DE10200106B4 Anordnung und Verlegung von Rohrleitungen für einen Erdkollektor in Kombination mit einem Versickerungssystem Assembly and installation of pipes for a ground collector in combination with a drainage system |
| 01/11/2006 | CN1718934A Construction method of channel seam seepage control |
| 01/11/2006 | CN1718933A Simple method of job site preparing channel seam water stopping bar |
| 01/04/2006 | CN2749935Y High-strength water tank for irrigation and drainage for agricultural field |
| 01/03/2006 | US6982379 Automotive electrical connection box and a method of mounting it |
| 12/28/2005 | CN2748507Y Gravity irrigation valve for paddy field |
| 12/22/2005 | US20050281617 Mitred grate and drain cover |
| 12/14/2005 | CN1707034A Environment protection drainageway construction method utilizing porous bricks |
| 12/08/2005 | WO2005116344A1 Inlet collar for highway culverts |