High quality plotting technique for raster printing devices
CA 2050909 A1 · Owner: Da Vinci Graphics, Inc. · Inventors: Warp, Rick A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus are disclosed for preparing and printing pen-stroke image information on a raster-type output device. The image is first vectorized, then given one of a number of slope classifications. For vertical vectors (210) and vectors within a predetermined angle of the vertical, only every n'th dot (214) on the vector is printed. For vectors in the next slope class closer to the horizontal (220), every (n/2)'th dot (224) is printed. For vectors in the next slope class closer to the horizontal (230) dots nk, nk + m2, and nk + m1 (234) are printed where k is, any integer, m2 is n/4, and m1 is n/2. For dots in the next slope class closer to the horizontal (240) every (n/4)'th …
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 26, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 26, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 26, 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.