Method and device for producing a substantially continuous composite video signal
CA 2067499 C · Owner: Schaeffer, George A. · Inventors: Schaeffer, George A.; Boyd, Ian A. R.; Rose, William J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to methods for forming a substantially continuous composite video signal (80). A method for forming a composite signal (80) comprises providing a video signal preprogrammed with data (102), reading or decoding and storing the data (102), determining where to combine a video field assembled from the data (102) with the video signal (80) and combining the, video field with the video signal (80) by switching between the two. A method for forming a substantially continuous video signal (80) comprises providing a video signal preprogrammed with fiats (102), reading or decoding and storing the data (102) receiving input indicating a desired video signal segment …
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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 October 10, 1990 and granted December 19, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 10, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 10, 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
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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.