Television signal processing apparatus
CA 2079300 A1 · Owner: 2777321 Canada Ltd. · Inventors: Zywiecki, Gary; Van Der Gracht, Peter; Peters, J. Basil
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A television signal processing apparatus for converting a television signal comprising baseband video with an aural subcarrier into a composite video and audio intermediate frequency signal has a splitter for splitting the television signal into identical first and second signals and first and second signal paths for, processing the first and second signal. The first signal path has a bandpass filter for filtering the video information to provide a filtered audio signal and a mixer for modulating the filtered audio signal onto an intermediate frequency to provide an audio intermediate frequency signal. The second signal path has a mixer for modulating the second signal onto an intermediate …
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 September 28, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 28, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 28, 2014.
- 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.