Apparatus and method for producing visual effect
CA 2123607 C · Owner: Shimoda, Susumu · Inventors: Kato, Hiroshi; Shimoda, Susumu; Idesawa, Masanori
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The apparatus comprises a first object in which a plurality of windows are arranged around a rotational shaft and a polygonal second object so arranged as to be partially observed through the windows of the first object. The first object and second object rotate relatively around the rotational shaft. Because of optical illusion a visual, effect that the polygonal object is perceived expanding contracting, deforming and eccentrically rotating is produced.
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 September 14, 1993 and granted June 9, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 14, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 14, 2015.
- 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.