Apparatus for displaying images to viewers in motion
CA 2304602 A1 · Owner: Spodek, Joshua D. · Inventors: Gross, Matthew H.; Spodek, Joshua D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus for displaying still images to viewers in motion relative to those images, such as passengers on a subway train includes a plurality of images , mounted on a surface and a slitboard mounted between that surface and the viewer. As the viewers pass by, the slitboard acts like a shutter creating an , animation effect. In addition there is a stretching or widening effect that enlarges the images, allowing images to be "preshrunk," thereby allowing a large number of images in a small space increasing the available frame rate , of the animation. The stretching effect depends on the distance between the image surface and the slitboard.
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 July 28, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 28, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 28, 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.