Apparatus for rapidly clearing the output display of a computer system
CA 2010966 C · Owner: Ergene, Serdar · Inventors: Sun, Szu-Cheng; Ergene, Serdar
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A computer output system comprising a first full screen bitmapped memory, a second full screen bitmapped memory apparatus for providing input, signals for writing information to be displayed by an output device to each position of the first memory, apparatus for storing in the second memory the positions of each position of the first memory to be written to the output device and apparatus for comparing the signal stored at each position of the first memory and the signal stored at the same position of the second memory to determine whether information at the position is to be written to the output device.
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 27, 1990 and granted November 9, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 27, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 27, 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.