| Patents for E02B 13 - Irrigation ditches, i.e. gravity flow, open channel water distribution systems (1,251) |
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| 06/11/1985 | US4522534 Control method for open channel |
| 05/14/1985 | US4516528 Fish growing system |
| 08/07/1984 | US4464079 Irrigation system |
| 02/14/1984 | US4431338 Irrigation monitoring system |
| 10/04/1983 | US4407453 Diffusion apparatus for gated irrigation pipes |
| 09/20/1983 | US4405264 Coating a cloth with a waterproofing silicone rubber; curing; lining a depression |
| 08/16/1983 | US4398694 Irrigation pipe gate |
| 04/19/1983 | CA1144797A1 Liquid negative developer composition including a vinyl polymer latex and copolymer of alkyl vinyl ether and vinyl chloride as charge control agent |
| 02/17/1983 | WO1983000516A1 Method of providing earth covering useful for water harvesting and method for constructing same |
| 02/17/1983 | WO1983000515A1 Method of directing or holding water |
| 02/09/1983 | EP0071340A1 Method of directing or holding water |
| 02/09/1983 | EP0071339A1 Method of providing earth covering useful for water harvesting |
| 09/14/1982 | US4349296 Irrigation ditch gate |
| 07/27/1982 | US4341490 Self-sustaining land irrigating and hydroelectric power generating system |
| 06/01/1982 | CA1124532A1 Irrigation ditch gate |
| 10/06/1981 | US4293237 Irrigation and drainage apparatus |
| 07/15/1981 | EP0032086A2 Water pumping installation with a regulable floating water intake |
| 10/28/1980 | CA1088330A1 Subsurface irrigation and drainage system |
| 04/01/1980 | US4195784 Three layer irrigation tube and apparatus and method for producing same |
| 12/25/1979 | US4180348 Subsurface irrigation and drainage system |
| 10/02/1979 | US4169577 Irrigation pipe gate |
| 06/19/1979 | CA1056610A1 Flexible multilayer tubular structure for irrigation and process for its preparation |
| 03/20/1979 | US4145157 Modular drain field section |
| 02/13/1979 | US4139159 Flexible multilayer tubular structure for irrigation and process for its preparation |
| 11/28/1978 | US4126998 Irrigation apparatus |
| 10/03/1978 | US4117685 Method and means for irrigating soil and growing plants having varying water requirements |
| 09/26/1978 | US4116286 Probe |
| 09/12/1978 | US4112972 Waste water reclamation apparatus |
| 08/01/1978 | US4103495 Flow control device for an irrigation ditch |
| 07/25/1978 | US4102136 Pump system providing selective directional flow across fluid barrier |
| 07/04/1978 | US4098089 Method of laying subsoil membranes |
| 06/20/1978 | US4095750 Water conduit |
| 01/31/1978 | US4070864 Adjustable irrigation dam |
| 01/03/1978 | US4065926 Subterranean irrigation system |
| 11/15/1977 | US4057968 Irrigation gravel guard |
| 09/13/1977 | US4047387 Method of forming a subterranean water barrier and a plow for use therewith |
| 05/24/1977 | US4024717 Folding aluminum rice and irrigation box |
| 05/24/1977 | US4024716 Irrigation tubing coupling fastener |
| 03/29/1977 | US4014361 Automatic anti-siphon valve |
| 03/01/1977 | US4010298 Underground irrigation devices and methods of making and using the same |
| 01/04/1977 | US4000620 Gravitational irrigation system and method of installing |
| 12/21/1976 | US3998391 Flow restrictor and trickle emitter |
| 12/07/1976 | US3995435 Fluid flow control means |
| 11/23/1976 | US3992886 Irrigation gravel guard and clean-out means therefor |
| 09/28/1976 | US3982400 Distribution valve for irrigation channels |
| 05/25/1976 | US3958424 Liquid lifting and storage apparatus and method |
| 05/04/1976 | US3953978 Combined drain and flood gate |
| 04/27/1976 | US3952522 Irrigation systems automation |
| 04/20/1976 | US3951163 Automatic anti-siphon valve |
| 03/30/1976 | US3946762 Underground irrigation system |
| 02/24/1976 | US3939875 Permeable flexible plastic tubing |