Apparatus for monitoring moving aquatic organisms
CA 2057833 C · Owner: Pippy, John H. C. · Inventors: Pippy, John H. C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus that provides high contrast silhouette images of moving aquatic organisms against a brightly lit background. The apparatus comprises: a tunnel for confining the lateral and vertical motion of moving aquatic organisms, the tunnel having transparent top and front walls a rear wall, and, a bottom wall; a first retroreflective surface associated with the rear wall of the tunnel, and a second retroreflective surface associated with the bottom wall of the tunnel; a camera; a light source; support means for supporting the image sensing device in front of the tunnel and the light source in proximity with the image sensing device for directing light towards the retroreflective surfaces; …
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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 December 17, 1991 and granted November 11, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 17, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 17, 2013.
- 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.