Dynamic alignment of cathode ray tube rasters
CA 2259458 A1 · Owner: Simpson, Ron C. · Inventors: Webb, James R.; Simpson, Ron C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system for synchronous alignment of cathode ray tube (CRT) (108) rasters (12) by application of time variable rotational driver signals to the CRT rotation coil (14) during the trace of the raster. The system may be implemented by either digital of analog means of measuring and storing cathode ray tube (108) raster distortion data as rotational correction factor. The correction factor data is used by device circuitry to generate and apply the required time variable rotation driver signals to the CRT rotation coil, to , effect the desired CRT raster (107) alignment.
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 May 22, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 22, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 22, 2019.
- 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.