Apparatus suitable for searching objects in water
CA 2266946 C · Owner: Sekine, Chogo · Inventors: Sekine, Chogo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fish finder having two 1D transducer arrays vertically arranged on a ship's hull. Each 1D transducer array provides a beam having a narrow width on a plane parallel to a plane in the transducer arrangement direction and a fan-like beam on a plane crossing the plane. Ultrasonics are transmitted toward and received from the target on the first plane by using the fan beam of the first 1D transducer array and received from the second plane perpendicular to the first plane by using the fan beam of the second 1D transducer array. While the beam direction of the first 1D transducer array is gradually changed that of the second 1D transducer array is rapidly changed so that information concerning …
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
- Filed March 25, 1999 and granted October 28, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 25, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 25, 2021.
- 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.