Television receiver and decoder for closed-caption broadcast
CA 2090934 C · Owner: Muramoto, Yoshifumi · Inventors: Muramoto, Yoshifumi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A television receiver comprises a closed-caption signal demodulator, an, existence-of-closed-caption-signal discriminator located upstream of the demodulator, and a character memory for reading a character, which means that a closed-caption signal exists on the screen of the television receiver upon receipt of a discrimination signal indicating that a closed-caption signal exists in an image signal from the existence-of-closed-caption-signal discriminator. With this television receiver the user can recognize, anytime that there exists a closed-caption signal in an image signal.
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 March 3, 1993 and granted April 7, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 3, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 3, 2015.
- 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.