| Patents for E02B 9 - Water-power plants; Layout, construction or equipment, methods of, or apparatus for, making same (2,361) |
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| 12/03/1991 | CA1292638C Tidal power apparatus |
| 11/27/1991 | CN1056537A Method and apparatus for prevention of fouling and/or corrosion of structures in seawater, brackish water and/or fresh water |
| 11/19/1991 | US5066167 Prestressed concrete lining in a pressure tunnel |
| 11/16/1991 | CA2083263A1 Method and apparatus for the prevention of fouling and/or corrosion of structures in seawater, brackish water and/or fresh water |
| 11/13/1991 | CN1014739B Dynamic energy output method of natural flow force of wave in river or sea and its hinge-type water turbine |
| 10/29/1991 | US5061121 Fluid-conveying conduit |
| 10/28/1991 | WO1991016981A1 Serpent sediment-sluicing system |
| 10/15/1991 | CA1290578C Beaver restricting device |
| 10/09/1991 | CN1014293B Circuit for putting in conference plurality of participants in telecommuniation systems |
| 07/24/1991 | EP0438383A1 Prestressed lining concrete in a pressure gallery |
| 07/23/1991 | CA1286581C Process and apparatus for installing a new pipe inside an existing pipe |
| 07/16/1991 | US5032038 Overflow spillway for dams, weirs and similar structures |
| 07/10/1991 | CN1052914A Overflow spillway for dams, weirs and similar structures |
| 06/26/1991 | EP0434521A1 High water spillway for barriers and similar works |
| 06/25/1991 | US5027000 Method and apparatus for generating electricity using wave energy |
| 06/05/1991 | CN2078341U All-weather substation |
| 05/29/1991 | CN1012690B Generating equipment for desalination of seawater and purification of waste water |
| 03/27/1991 | EP0412088A4 Closed system, standpipe operated hydroelectric power plant |
| 03/27/1991 | CN2073898U Theft-proof strengthening device for door lock |
| 03/12/1991 | US4998847 Drainage conduit which is resistant to clogging by beavers |
| 03/12/1991 | US4998846 Concrete dam bottom discharge works |
| 02/13/1991 | EP0412088A1 Closed system, standpipe operated hydroelectric power plant |
| 02/06/1991 | EP0411278A1 Method and apparatus for destroying an underground pipe |
| 11/06/1990 | CA1275813C Large diameter burried pipe |
| 10/17/1990 | EP0392912A2 Fluid conveying conduit |
| 08/22/1990 | EP0157764B1 Power generation from waves on the surface of bodies of water |
| 08/21/1990 | CA1272937A1 Apparatus for the generation of hydroelectric power and method of manufacturing and installing same |
| 07/26/1990 | CA2008582A1 Concrete dam bottom discharge works |
| 07/17/1990 | US4941771 Hydroelectric plant |
| 06/13/1990 | DE3841344A1 Superpressure hydroelectric power plant |
| 05/22/1990 | US4926541 Method of assembling wound rotor of vertical type adjustable speed hydroelectric rotating machine at its installation site |
| 05/10/1990 | DE3837789A1 Circular sand trap for smaller and medium-sized hydroelectric power plants with tangential feed and centripetal outlet of the pure water (cyclone sand trap) |
| 04/11/1990 | CN2055805U Rotation wheel type flow speed power generating ship |
| 04/04/1990 | EP0361208A2 Water intake device |
| 03/21/1990 | EP0358945A2 Method of assembling wound rotor of vertical type adjustable speed hydroelectric rotating machine at its installation site |
| 02/06/1990 | US4897911 Method of placing plastic tubes into existing openings |
| 11/08/1989 | CN1037056A Autocontrol system of small hydroelectric power station and the design method thereof |
| 10/18/1989 | CN1036423A Dynamic energy output method of natural flow force of wave in river or sea and its hinge-type water turbine |
| 09/26/1989 | US4869294 Buried large cross-section conduit |
| 09/21/1989 | WO1989008793A1 Closed system, standpipe operated hydroelectric power plant |
| 09/20/1989 | CN1035695A Low head supercharged hydraulic power station and supercharger |
| 09/19/1989 | US4867921 Process for installing a new pipe inside an existing pipeline |
| 08/16/1989 | CN2042819U Umbrella-sail propelling ship and umbrella-sail type electric power generating device |
| 06/07/1989 | CN1033342A Circuit for putting in conference plurality of participants in telecommuniation systems |
| 02/28/1989 | US4807437 Closed system, standpipe operated hydroelectric power plant |
| 02/09/1989 | DE3727786A1 Verfahren und vorrichtung zum installieren einer neuen rohrleitung innerhalb einer bestehenden rohrleitung Method and apparatus for installing a new pipeline within an existing pipeline |
| 01/18/1989 | CN1030467A Pressure conduits |
| 01/11/1989 | EP0188487B1 Large cross-section sunken conduit |
| 01/10/1989 | US4797028 Beaver control siphon apparatus |
| 12/06/1988 | US4789585 Heat transfer block for cross flow heat exchanger |
| 11/30/1988 | EP0292703A2 Process and device for laying plastic pipes |
| 10/05/1988 | CN87208017U Finned flat-shell waterproof anchor gate |
| 09/20/1988 | US4772157 Liquid level control system and method of operating the same |
| 07/20/1988 | CN87202707U Floating hydroelectric generating station |
| 06/15/1988 | CN86108144A Underflow electricity generating plan |
| 06/01/1988 | CN87207428U Pressurized wave power generating equipment |
| 05/24/1988 | US4746244 Apparatus for the generation of hydroelectric power and method of manufacturing and installing same |
| 05/05/1988 | DE3637083A1 Barrier weir |
| 04/07/1988 | DE3632189A1 Pressure tunnel |
| 04/05/1988 | US4735234 Buried large cross-section conduit |
| 03/22/1988 | CA1234329A1 Method and apparatus for absorbing wave energy and generating electric power by wave force |
| 03/02/1988 | CN86104782A Maneuver hydroelectric power station |
| 02/25/1988 | WO1988001321A1 Stepwise pumping-up hydroelectric apparatus |
| 12/23/1987 | CN86103784A Usage of inland river downpipe |
| 12/10/1987 | DE3618552A1 Hydroelectric power-generating systems |
| 11/04/1987 | CN87103315A Multi-stage hydraulic electrogenerating method |
| 10/06/1987 | US4697984 Supporting structure for underwater structure |
| 07/21/1987 | CA1224339A1 Offshore intake structure |
| 05/12/1987 | US4664853 Energy dissipator |
| 05/12/1987 | CA1221552A1 Pipe laying and replacement |
| 04/22/1987 | CN86105027A Drift tube type hydroelectric boat and submarine |
| 02/24/1987 | US4646067 Security bar rack |
| 02/11/1987 | CN86103832A Method of generating electricity with floater by tide |
| 01/31/1987 | CN86103849A Method of generating electricity by using seawater potential energy and extracting cold seawater |
| 01/06/1987 | US4634313 Pipe laying and replacement |
| 09/23/1986 | US4613252 Method for the building of sea wave power plants |
| 09/16/1986 | CA1211320A1 Method for coating welded pipe joints with weighting material |
| 09/03/1986 | CN85106310A Low temperature energy exactor and still |
| 07/30/1986 | EP0188487A1 Large cross-section sunken conduit. |
| 06/10/1986 | US4594024 Offshore intake structure |
| 05/21/1986 | CN85201062U Gate type water flow interruption device |
| 05/13/1986 | CA1204390A1 Device for separating solid particles of dirt from cooling water for power stations and the like |
| 04/08/1986 | US4580400 Method and apparatus for absorbing wave energy and generating electric power by wave force |
| 03/25/1986 | CA1202227A1 Method and apparatus for tidal electric power generation using the buoyance energy of the tide |
| 01/30/1986 | WO1986000683A1 Large cross-section sunken conduit |
| 01/21/1986 | US4565627 Filters for uranium, gold or silver |
| 12/24/1985 | USRE32054 Arrangement for concentrating sea waves |
| 12/19/1985 | EP0157764A4 Power generation from waves on the surface of bodies of water. |
| 11/05/1985 | US4551247 Device for separating solid particles of dirt from cooling water for power stations |
| 10/16/1985 | EP0157764A1 Power generation from waves on the surface of bodies of water. |
| 09/10/1985 | US4540313 Apparatus for the generation of hydroelectric power and method of manufacturing and installing same |
| 07/16/1985 | US4529568 Modified polyurethane |
| 07/10/1985 | EP0147441A1 Method and apparatus for generating a flow through a pipe below the surface of a body of water |
| 07/03/1985 | EP0147095A1 Improvements in pipe laying and replacement |
| 03/28/1985 | WO1985001324A1 Power generation from waves on the surface of bodies of water |
| 12/06/1984 | WO1984004767A1 Method and apparatus for generating a flow through a pipe below the surface of a body of water |
| 10/25/1984 | WO1984004119A1 Apparatus to use wave energy |
| 08/07/1984 | US4464080 For extracting power from ocean tides, ocean currents or flowing rivers |
| 07/17/1984 | CA1170960A1 Tidal power plant |
| 06/19/1984 | CA1169332A1 Radial gate having fine tuning of flow control |