Scanned flip-disk sign improvements
CA 2319471 A1 · Owner: Black, F. Martin · Inventors: Black, F. Martin; Dye, G. Frank
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A modular display apparatus for displaying indicia at a front thereof has an inner frame (10) with horizontal support beams (12) the inner frame (10) , supporting a plurality of grid modules (18) at least one grid module (18) , being located above another. A plurality of pixels (20) rotationally mounted to the grid modules (18) each includes first and second display faces (60 62) , joined along respective adjacent edges (64). The pixels (20) have a center of gravity located on each pixel (20) so as to interact with an external force applied to the pixel (20) and provide a complete rotation with a minimum of , bounce, to display a desired display face (60 62). A triggering mechanism , …
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 February 6, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 6, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 6, 2020.
- 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.