Color display system
CA 1238729 A · Owner: International Business Machines Corporation · Inventors: Honda, Kazutoshi; Suzuki, Hirohisa
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The disclosure describes a graphic driving assembly similar to that of the prior art but including a pattern memory for storing possible character patterns and a, pointer memory having a plurality of storage locations corresponding to character display locations on a screen. Each of the storage locations stores address information of the pattern memory in which the character patterns to be displayed is placed. A color information memory having a plurality of storage locations in the same number as those of the pointer memory, each storage location storing color information of the character pattern to be displayed, whereby, in simultaneously displaying colour graphic patterns and color …
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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 June 28, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 28, 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.