Frame buffer for multimedia terminal
CA 2210370 C · Owner: Ibm Canada Limited-Ibm Canada Limitee · Inventors: Ristau, Gerhard R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multimedia terminal for adapting audio-video signals into a digital data network is provided. The terminal comprises a video decoder a video encoder, a frame buffer, and a host processor coupled to the frame buffer. The frame buffer has a plurality of memory fields a, system time clock that is switchable from a free running clock to being locked to the analog video signals and a frame buffer logic control circuit which controls the flow of data in and out of the memory fields. The frame buffer is able to operate in two distinct modes.
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 July 11, 1997 and granted January 1, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 11, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 11, 2019.
- 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.