Chroma key system
CA 2280487 A1 · Owner: Daisho Denki Inc. · Inventors: Monjo, Yoshio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The chroma key system discriminates background and non-background by color difference. Further, the chroma key system changes background color by illuminating the background via background illumination equipment discriminates the changing background color as background and thereby, discriminates background from non-background.
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 August 19, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 19, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 19, 2021.
- 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.