Patents for E02B 11 - Drainage of soil, e.g. for agricultural purposes (2,085) |
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08/25/1981 | US4285613 Apparatus for forming and installing underground drainpipe |
08/20/1981 | WO1981002317A1 Method of burying wire,tube or cable under ground |
08/12/1981 | EP0033570A1 Plastics corrugated pipe |
07/28/1981 | US4280534 Plastics pipes having walls with lengthwise extending channels |
06/17/1981 | EP0030480A1 Draining, irrigating and dispersing material |
06/16/1981 | US4273367 Pipe coupling |
06/11/1981 | WO1981001580A1 An arrangement relating to a drainage pipe |
06/11/1981 | WO1981001579A1 An arrangement relating to a drainage pipe |
06/03/1981 | EP0029816A1 Ditching method and device |
06/03/1981 | EP0029713A1 Land drain comprising a drainage conduit covered by a knitted fabric filter sleeve |
06/02/1981 | US4270878 Corrugated drainage tubing and method and apparatus for making drainage tubing with helically arranged drainage openings |
05/28/1981 | WO1981001433A1 Ditching method and device |
04/22/1981 | EP0027150A1 Apparatus for forming and installing underground drainpipe |
04/07/1981 | US4260283 De-watering system |
03/31/1981 | CA1098327A1 Drain trap |
03/24/1981 | CA1098146A1 Pipe coupling |
02/11/1981 | EP0023871A1 Material and device for draining, and manufacturing method |
02/03/1981 | CA1094830A1 Sub-surface irrigation channel forming vehicles |
01/20/1981 | US4246305 Perforated polyethylene strips with internal channels, made by extrusion |
01/20/1981 | US4245924 Arch conduit |
12/09/1980 | CA1091048A1 Corrugated drainage tubing and method and apparatus for making drainage tubing with helically arranged drainage openings |
12/09/1980 | CA1090969A1 Circular extrusion method and apparatus involving rotation around the die axis |
12/02/1980 | CA1090594A1 Method of preventing subsoil water contamination |
11/25/1980 | US4235561 Subterranean irrigation means and system |
11/18/1980 | US4234267 Drain trap |
11/11/1980 | CA1089243A1 Apparatus for watering and draining soil |
10/28/1980 | CA1088330A1 Subsurface irrigation and drainage system |
09/09/1980 | US4221505 Sub-surface irrigation channel |
08/05/1980 | US4215727 Plastic well pipe |
06/12/1980 | WO1980001196A1 Arched conduit and method of handling same |
06/12/1980 | WO1980001180A1 Drain pipe |
03/11/1980 | CA1073227A1 Pipe for underdraining |
03/11/1980 | CA1073226A1 Underdrainage pipe |
02/12/1980 | US4188154 Apparatus for watering and draining soil |
01/23/1980 | EP0007045A1 Filter tube |
01/22/1980 | US4184831 Apparatus for producing plastic drain pipes |
01/15/1980 | US4183696 Underground drainage pipe |
01/08/1980 | US4182581 Pipe for underdraining |
01/08/1980 | US4182580 Underdrainage pipe |
12/25/1979 | US4180464 Method of covering corrugated drainage tubes |
12/25/1979 | US4180348 Subsurface irrigation and drainage system |
12/12/1979 | EP0005982A2 Machine for filling a pre-cut slot in the ground |
10/23/1979 | US4171921 Method for preventing the contamination of subsoil water from products deposited on the ground or in underground cavities |
08/07/1979 | US4163619 Corrugated drainage tubing with helically arranged drainage openings |
08/07/1979 | CA1059775A1 Corrogated drainpipe and method of manufacturing same |
06/19/1979 | US4158534 Apparatus for cutting openings at arbitrarily selectable intervals into pipes |
06/13/1979 | EP0002294A1 A plastics well pipe |
06/05/1979 | CA1055837A1 Apparatus for cutting openings in a trickle irrigation pipe |
02/21/1979 | EP0000788A1 Draining ditch headwall unit |
02/20/1979 | US4140422 Plastic corrugated drainage pipe |
02/20/1979 | CA1048800A1 Drain digging machine |
02/13/1979 | US4139676 Consolidation of aggregate material |
02/06/1979 | CA1047780A1 Control for cable plows and the like |
01/16/1979 | US4134268 Drainage field pipe |
01/09/1979 | CA1045992A1 Plastic pipe having walls with lengthwise extending channels |
12/05/1978 | CA1043580A1 Drainage machine with a breaking up tooth |
10/10/1978 | US4119157 Control for cable plows and the like |
09/26/1978 | US4116286 Probe |
09/12/1978 | US4113818 Corrugated plastic |
08/29/1978 | US4110420 Method for extruding porous irrigation pipe |
08/01/1978 | US4103443 Linkage for an excavating tooth |
07/25/1978 | US4102135 Underground drainage pipe |
07/04/1978 | US4098089 Method of laying subsoil membranes |
06/20/1978 | US4095750 Water conduit |
06/13/1978 | US4094466 Irrigation apparatus |
05/16/1978 | US4089108 Filter sleeve stuffing machine |
04/04/1978 | US4082327 Connecting joint for corrugated plastic tubing |
01/03/1978 | US4065925 Underground drainage pipe |
11/08/1977 | US4057500 Earth drain |
09/06/1977 | US4045964 Subterranean panel drain |
08/23/1977 | US4043135 Trench cutter for excavating trenches and for laying water pipes and drainage pipes |
05/24/1977 | US4024894 Perforated corrugated tube and method and apparatus for manufacturing the same |
05/03/1977 | US4020639 Oval pipe with a flat base |
04/26/1977 | US4019326 Nonwoven horizontal drainage system |
04/12/1977 | US4016727 Drain trough member and its connector |
03/15/1977 | US4011727 Movable cable plow for constructing underwater cable |
02/08/1977 | US4006599 Plastic drain pipe and apparatus for producing the same |
01/18/1977 | US4003408 Polyethylene binder and elastomer bodies |
08/24/1976 | US3976578 Protective sleeve for corrugated drainage tubes |
07/13/1976 | US3968654 Underground drain pipe coupling |
06/29/1976 | US3965686 Drain sheet material |
06/01/1976 | US3959977 Concrete slip forming apparatus |
05/25/1976 | US3958425 Corrugated plastic drainage pipe with integral coupler |
05/18/1976 | US3957087 Pin and truss cylinder construction |
02/03/1976 | US3936380 Means to counteract a clogging of drain pipes |