Digital video tape recorders
CA 1295047 C · Owner: Wilkinson, James Hedley · Inventors: Wilkinson, James Hedley; Ive, John Goodwin Spencer
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A digital video tape recorder comprises a head drum four transducer, heads mounted in pairs on the head drum for recording oblique tracks on a magnetic tape, a demultiplexer for distributing digital data to be recorded and corresponding to a video signal such that each Field of the video signal is divided into 50-line segments, the digital data corresponding to each field are evenly distributed between all four of the heads for recording and each, track comprises a block of digital data relating to one 50-line segment and a block of digital data relating to another 50-line segment the two blocks of, digital data being separated by an edit gap.
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 January 28, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 28, 2009.
- 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.