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| Number | Title | Issue Date |
| 6453596 | Procedure for electro-stunning and/or electro-sacrifice, for industrial application to marine inchthyological species in floating cages Procedure for electro-stunning and/or electro-sacrifice, for industrial application to marine ichthyological species in floating cages having a floating cage (12) with tuna fish (6) two divers are introduced, the hunter (1), who uses a rifle with a harpoo... | 09/24/2002 |
| 6170436 | By-catch reduction acoustic device Acoustic devices, attached to fishing nets, reduce or avoid by-catch of marine animals during fishing operations. The acoustic devices emit a deterrent signal to a particular marine animal on actuation by the approach of the animal. At least one of the de... | 01/09/2001 |
| 6138397 | Method and device for operation of a trawl There is referred to a process and an arrangement for control of one or more trawls (12, 40, 42) which are towed after a vessel (10), where the trawl(s) (12, 40, 42) are connected to the vessel by means of a number of cables (16, 14; 44, 45, 46), and wher... | 10/31/2000 |
| 6038494 | Control system for enhancing fish survivability in a hydroelectric power generation installation A system for controlling a hydroelectric power production facility includes sensors for detecting the presence of fish adjacent to the facility. A controller linked to the sensors controls the orientation of control surfaces associated with a turbine/gene... | 03/14/2000 |
| 5797210 | Apparatus for electro-fishing Electro-fishing apparatus comprising a trawling net (16) which during operation is towed over the bottom, a combination of electrodes (10, 12) which, during operation, are towed over the bottom at a distance in front (14) of the net (16), and a pulse gene... | 08/25/1998 |
| 5644863 | Fishing gear for electric fishing Fishing gear for electric fishing, comprising a beam (5) which is provided with pairs of electrodes (9, 10) over which a potential difference can be generated, as well as a power source (16) and pulse generator. The power source (16), the pulse generator ... | 07/08/1997 |
| 5289133 | Power density methods for electroshocking Apparatus and method for measuring power density in an energized volume of water using either a measurement of voltage gradient or current density for use in determining optimal electrical power parameters for electrofishing, in-water electroshocking, ele... | 02/22/1994 |
| 5123195 | Method and apparatus for separating targeted species of aquatic life A shrimp trawl or net having a second piggyback net attached to an opening in the top side of the body of the trawl and a pulser to stimulate mature shrimp to enter the opening in the second net. Alternatively, an upper deck is formed in the body of the m... | 06/23/1992 |
