Fish repelling apparatus using a graduated electric field
CA 1304442 C · Owner: Smith-Root Incorporated · Inventors: Smith, David V.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electric barrier for discouraging the passage of fishes through a natural or artificial waterway, or for repelling fishes from the vicinity of an underwater structure in a waterway. A submerged electrode array is provided for electrifying at least a portion of a waterway when energized by a plurality of electric pulse generators. The outputs of the pulse generators are connected series aiding and serially connected to the electrodes of the array so that when synchronously triggered, the outputs are in phase and additive in amplitude along the electrode array. Each pulse generator is adjustable in output amplitude so that a graduated electric field can be provided to minimize the injury …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted June 30, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 30, 2009.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.