Channel selecting apparatus
CA 2019339 C · Owner: Toshiba Audio Video Engineering Co. Ltd. · Inventors: Tsukagoshi, Masahiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A channel selecting apparatus for television receivers and the like wherein, in case data showing a predetermined channel are housed in a memory (RAM of a channel selecting microcomputer), a first channel selection instructing means will give a tuner a channel selection controlling signal based on these data but in, case the data showing the predetermined channel are not housed in the memory, a second channel selection instructing means will sequentially give channel selection controlling signals for receiving respective channels and, when a judging signal showing that a broadcast signal is included in a receiving channel is input from a judging circuit, that channel will be received.
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 June 20, 1990 and granted October 26, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 20, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 20, 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.