Method of reducing document size for digital display
CA 2128389 C · Owner: O'Gorman, Lawrence Patrick · Inventors: O'Gorman, Lawrence Patrick
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of enhancing predefined features of a scanned image of a document page of reduced size for display includes subsampling the pixels of the scanned image to achieve a desired degree of reduction of the image size. The substampled signals are passed through a filter to obtain gray scale values. A sharpening filter is applied to the subsampled pixels to enhance the predefined features of the image.
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 20, 1994 and granted May 11, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 20, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 20, 2016.
- 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.