Method of and means for providing information to edit a video tape
CA 2033979 C · Owner: Roggendorf, Peter · Inventors: Roggendorf, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An editing device for half-inch video tape applies pulse-width modulation to prerecorded synchronizing pulses in predetermined intervals. The inverval starts with an eleven-bit header (44) compatible with the VASS system. Pulse-width modulated time codes (48) identify the recording session and the elapsed time are then added. A check code (60) completes the modulation for fifty-hz systems, e.g. PAL and SECAM. For sixty-hz systems e.g. NTSC, a ten-bit dummy code (62) is added to complete the interval. The code is entered without writing over the leading edge of the prerecorded synchronizing pulse allowing the timing of, those pulses to continue without interruption. An editor can locate any …
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 May 10, 1990 and granted January 2, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 10, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 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
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.