| Patents for E02B 11 - Drainage of soil, e.g. for agricultural purposes (2,085) |
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| 03/02/2000 | WO2000011269A1 Pipe for draining or irrigating water or waste water |
| 02/22/2000 | US6027283 End caps for drainage system |
| 01/26/2000 | EP0974703A1 Half-shells to replace parts of sewer channels |
| 01/19/2000 | EP0842330B1 Method and device for burying a conduit under water |
| 01/05/2000 | EP0969151A1 Covered drainpipe |
| 12/29/1999 | EP0966571A1 Subsurface fluid drainage and storage systems |
| 11/16/1999 | US5984584 Fairings for drilling riser control pod hoses |
| 11/11/1999 | DE19826834C1 Geotextile drainage sheet with improved resistance to compaction incorporating bracing layer and filtration layer |
| 11/10/1999 | CN1046325C Complex cloth without spinning |
| 11/09/1999 | US5980155 Composite geosynthetics and methods for their use |
| 10/27/1999 | EP0952257A2 Module for forming drainage trenches in the ground |
| 09/22/1999 | EP0943737A1 Irrigation and drainage box |
| 09/22/1999 | EP0943233A1 Method suited to improve the conditions of humidity and ventilation around the roots of the plants in a cultivation |
| 09/21/1999 | US5954451 Multi-layer material for processing septic efficient and waste water and method of using the same |
| 08/10/1999 | US5934828 Drainage method and strap draining materials therefor |
| 08/04/1999 | EP0933477A1 Drainage method and strap draining materials therefor |
| 08/03/1999 | US5930923 Method for operation to excavate underdrain in the field ground and a device for operation to excavate underdrain |
| 07/21/1999 | CN2329704Y Assemble U-draining device |
| 06/29/1999 | US5916104 Box, an insulating system, and a ground drainage system |
| 06/17/1999 | DE19722951C1 Covering and drainage bead for concrete building section |
| 06/15/1999 | US5911540 Subterranean liquid distribution apparatus |
| 06/08/1999 | US5909982 Large-depth underground drainage facility and method of running same |
| 05/06/1999 | WO1999021802A1 Gray water recycling system |
| 04/28/1999 | CN2316339Y Vibration impact type machine for vertically spreading plastics and grooving |
| 04/01/1999 | WO1999015734A1 Fluid feed or discharge device |
| 03/24/1999 | CN1211501A Laminated structure article |
| 03/10/1999 | CN1042448C Earth drains |
| 03/04/1999 | WO1999010604A1 A method of and apparatus for providing a subterranean drain |
| 03/02/1999 | US5877096 Non-woven needle-punched filter fabric |
| 02/25/1999 | WO1999009298A1 Segment for intake tunnels |
| 02/16/1999 | US5870865 Method for repairing a drainage system |
| 02/02/1999 | CA2185087C Using multi-layer material in processing of septic effluent and waste water |
| 01/28/1999 | CA2213048A1 Box and insulating system for ground drainage |
| 01/27/1999 | CN1206058A Water drainage method and belt drainage component used therein |
| 01/21/1999 | WO1999002784A1 Low cost installation of columns of material |
| 01/14/1999 | DE19729230A1 Surface for roads, paths, industrial and commercial areas, etc. |
| 12/24/1998 | DE19725692A1 Surface for roads, paths, industrial and commercial areas, etc. |
| 12/15/1998 | US5848856 Subsurface fluid drainage and storage systems |
| 11/25/1998 | EP0879922A2 Stacked structure |
| 11/17/1998 | US5836716 Drainage pipe |
| 11/11/1998 | EP0877126A2 Infiltration device |
| 11/03/1998 | US5829916 Drainfield pipe |
| 10/20/1998 | US5823711 Water drainage and collection system and method of construction thereof |
| 10/14/1998 | EP0870875A2 A vertical drain |
| 10/14/1998 | EP0870874A1 Method and device for putting a drain pipe almost horizontally in the ground |
| 10/13/1998 | US5820296 Prefabricated vertical earth drain and method of making the same |
| 10/07/1998 | CN2293593Y Clean water-storing water tank |
| 10/06/1998 | US5816742 Permeable conduits for disbursing fluids |
| 09/22/1998 | US5810510 Underground drainage system |
| 09/22/1998 | US5810509 Buried field drainage pipe |
| 08/13/1998 | WO1998035106A1 Subsurface fluid drainage and storage systems |
| 08/06/1998 | DE19704165A1 Surface for roads, paths, industrial and commercial areas, etc. |
| 08/06/1998 | DE19703826A1 Drainage tube made of porous material |
| 07/22/1998 | EP0646213B1 Process and tool for laying underground collector mains for liquids and gases |
| 07/14/1998 | US5780144 Planar drainage and impact protection material |
| 07/08/1998 | EP0734478A4 Underground drainage system |
| 07/07/1998 | US5776387 Method of forming stabilized porous pipe |
| 06/17/1998 | EP0847462A1 Novel draining wall, method for producing same and element implementated thereby |
| 06/17/1998 | EP0734604B1 Cable duct element |
| 05/28/1998 | DE19647361A1 Laminated floor surface for roads, etc. |
| 05/20/1998 | EP0842330A1 Method and device for burying a conduit under water |
| 05/19/1998 | US5752784 Low profile drainage network for athletic field drainage system |
| 05/14/1998 | DE19648365C1 Foundation shrouding |
| 05/13/1998 | EP0840546A1 Device to introduce fluids into soil, filter beds etc. or to remove them from same |
| 04/30/1998 | WO1998017870A1 Elasticized geosynthetic panel, geofoam composition and method |
| 03/31/1998 | US5733065 Underground drainage facility, vertical-shaft multi-stage adjustable vane pump, and method of running drainage pump |
| 03/11/1998 | CN1175647A Light-weight material for burying in civil engineering |
| 02/04/1998 | EP0822295A1 Drain forming equipment for reinforcing soft ground, and method and structure for arranging drains |
| 02/03/1998 | US5713696 Elasticized geosynthetic panel and geofoam composition |
| 12/31/1997 | WO1997049871A1 Novel draining wall, method for producing same and element implementated thereby |
| 12/03/1997 | EP0809431A1 Drainage and irrigation system for natural turf athletic field |
| 11/27/1997 | WO1997043895A1 Device to introduce fluids into soil, filter beds etc. or to remove them from same |
| 11/25/1997 | US5689921 Footing connector and method of use |
| 11/20/1997 | DE19619957A1 Pipes for drinking water treatment, drainage wells, irrigation or water=wheels comprising quartz sand and poly:urethane binder |
| 11/18/1997 | US5688073 Earth drains |
| 10/10/1997 | CA2202233A1 Underdrain pipe |
| 09/17/1997 | EP0795061A1 Drainage wall buried in the ground |
| 08/28/1997 | DE19607242A1 Golf installation |
| 08/19/1997 | US5657527 Methods for making light-weight drainage line units |
| 08/06/1997 | EP0787865A1 Box and system for insulation and ground drainage |
| 07/31/1997 | DE19612573C1 Method of temporarily sealing catchwater drain pipe during laying |
| 07/24/1997 | WO1997025856A1 Drainage and/or irrigation |
| 07/15/1997 | US5647690 Low cost installation of columns of material |
| 06/17/1997 | US5639364 Light-weight drainage line units |
| 06/04/1997 | EP0777017A1 Pipeline with concentric pipes |
| 06/03/1997 | US5634741 Form-drain filter clamp |
| 06/03/1997 | US5634311 Drainage conduit |
| 05/21/1997 | EP0656091B1 Retractable hose |
| 04/29/1997 | US5624226 Underground drainage facility, vertical-shaft multi-stage adjustable vane pump, and method of running drainage pump |
| 04/29/1997 | CA2105787C Slotted drain |
| 04/24/1997 | DE19539109A1 Drainage for cemetery situated between rows of graves and comprising narrow trench |
| 04/16/1997 | EP0768432A1 Drainage system and method for earth and walls using a granular material |
| 04/16/1997 | EP0768431A1 Gutter system |
| 04/09/1997 | EP0672214A4 Stabilized porous pipe. |
| 03/13/1997 | WO1997009486A1 Drainage wall buried in the ground |
| 03/05/1997 | EP0702740B1 Earth drains |
| 03/04/1997 | US5607107 Retractable hose |
| 02/11/1997 | US5601907 Three-dimensionally constructed net |
| 02/06/1997 | WO1997004181A1 Method and device for burying a conduit under water |
| 02/06/1997 | WO1997004178A1 Earth drains |