Method of drawing a line segment in a graphics system
CA 2030182 A1 · Owner: Digital Equipment Corporation · Inventors: Kelleher, Brian M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method is provided for generating pixel color information for use in producing an image of a line segment on a graphics display screen, the method comprising the steps of: denoting at least one planar region of the display screen that encompasses the line segment; assigning respective intensity values for at least three selected pixels encompassed by the at least one planar region; assigning respective color values for the at least three selected pixels; and interpolating respective final color values for each respective pixel encompassed by the at least one planar region based upon the respective assigned intensity values and the respective assigned color value. A-51573/SCD
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 16, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 16, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 16, 2012.
- 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.