Television system
CA 2032953 C · Owner: Ito, Toshiya · Inventors: Ito, Toshiya; Sugimori, Yoshio; Kimata, Yoshihide
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A television transmitting system transmits to a television screen having aspect ratio of 3:4 by providing no-picture portions in upper and lower sections of an oblong screen having aspect ratio different from the above. Auxiliary signals are inserted in the no-picture portions and are used as the signals for improving the resolution on the receiving side. A signal is obtained by shifting signal component, exceeding horizontal band determined by lateral width of the raster, to lower frequency and one of the following signals is transmitted at the same time: a. a signal obtained by shifting signal component in the band higher than vertical frequency determined by the number of scanning lines …
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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
- Filed December 21, 1990 and granted September 24, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 21, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 21, 2012.
- 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.