Graphics system
CA 2012406 C · Owner: Hidaka, Kazuyoshi · Inventors: Hidaka, Kazuyoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A graphics system in accordance with the present invention comprises a display, a pointing device for designating a point on a screen of said display, and a storage apparatus. The system further comprises means for selecting a line existing on the screen and a point thereon in response to the designation of a point on the screen by said pointing device, means for generating geometric data of boundary lines of plural angle regions on the screen whose reference, line is supposed to be the selected line and whose reference point is supposed to be the selected point thereon means, for determining the boundary line which is closest to a newly designated point on the basis of said geometric data …
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 March 16, 1990 and granted October 4, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 16, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 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.