Two dimensional scaler
CA 2102935 C · Owner: Lum, Sanford S. · Inventors: Lum, Sanford S.; Bennett, Dwayne R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to an image scaler comprised of apparatus for receiving coefficients a and b and image display values of adjacent pixels P and Q respective of an image apparatus for repeatedly operating on said coefficients and values for successive pixels according to the transform (see above formula) where SUM is the sum of the the coefficients R is either zero or the accumulated SUM of an immediately preceding operation A cc is an accumulated result signal, and apparatus for providing a first result signal as an output coefficient word for controlling the display of each of adjacent pixels.
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 November 12, 1993 and granted January 25, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 12, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 12, 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.