Apparatus for combining video signals
CA 1323689 C · Owner: Windrem, Kevin D. · Inventors: Jackson, Richard A.; Windrem, Kevin D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A processing circuit for receiving a shaped video signal V3' and an associated key signal K3 and providing output signals in response thereto. The processing circuit has at least a first mode of operation and includes a first system operative in the first mode of the processing circuit to generate an output video signal V3" given by, V3" = V3' + A where A is independent of V3'. The circuit also includes a second system operative in the first mode to generate an output key signal having a constant value.
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
- Granted October 26, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 26, 2010.
- 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.