Display control system
CA 1232381 A · Owner: Ascii Corporation · Inventors: Ishii, Takatoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved display control system is disclosed which is capable of reducing the time necessary for executing its display operation. In this display control system when a, display memory is to be accessed its software supplies values, on the X Y coordinates in a display screen and these values are then converted into the physical addresses of the memory. For this purpose, a limit check function is provided. Also an X, register for setting up values on the X coordinate in a display unit is formed of a counter, thereby eliminating the need for setting the values on the X coordinate each time. The display control system is also capable of dealing with the change of a plurality of screen …
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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
- Granted February 2, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 2, 2005.
- 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.