Graphic drawing system
CA 2103262 C · Owner: D'Aviau De Piolant, Jean-Louis · Inventors: D'Aviau De Piolant, Jean-Louis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A graphic drawing system of the type comprising a drawing surface; a stylus which is displaceable on the surface in order to simulate tracings; and means determining the coordinates of the stylus in the plane of the surface with respect to a reference. The system has means for varying the thickness of lines drawn by the stylus.
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 May 18, 1992 and granted April 27, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 18, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 18, 2014.
- 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.