Sculpture and method of making same
CA 2182997 C · Owner: Yau, Peter · Inventors: Yau, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sculpture (10) provided with a concavity (16) carrying a relief negative impression (18) of a formation representing a true object the formu-, tion having selected features of proportion: ratio selectively of height: width, of length: width and of depth: width different (1.3:1) compared to the corresponding proportion: ratio of the true object as 1:1. Observation of the sculpture (10) under illumination by a moving observer evokes to the observer, a three-dimensional virtual illusion of movement where the sculpture appears to move in the direction of movement of the observer. A process of forming the sculpture (10) includes the steps of forming sculpted copy of the formation; forming a …
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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 September 26, 1995 and granted April 30, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 26, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 26, 2017.
- 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.