Video display system
CA 1329652 C · Owner: Kaiser Electronics · Inventors: Roy, Edmond F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention uses a multiple beam cathode ray tube to write a television type raster or frame, with the maximum data rate and writing speed reduced by a factor equal to the number of simultaneously operating beams. To overcome excessive slope in the picture a, stepped deflection is used such that the majority of vertical deflection occurs after a particular horizontal sweep is completed and before the successive sweep begins. The scanning speed is further increased by using an optical transmission filter capable of selectively transmitting separate colors emitted by the screen of the cathode ray tube wherein a portion of the filter may be set to transmit the next color in the color …
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
- Granted May 17, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 17, 2011.
- 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.