Apparatus for recording and/or reproducing an information signal and a video signal in a helical track on a record medium
CA 2063925 C · Owner: Ohkubo, Hirotsugu · Inventors: Ohkubo, Hirotsugu; Yamazaki, Hiroshi; Ogawa, Kazuyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A signal recording and/or reproducing apparatus such as a video tape recorder or the like records and/or, reproduces an information signal indicating a date of recording, a video signal and a PCM signal from a helical track on a record medium, such as a magnetic tape. The track has first and second portions which respectively record the PCM signal and the video signal. In certain advantageous embodiments, the information signal is recorded in a guard band area between the first and second portions of the track. The apparatus has the capability of selectively superimposing the date information on the video signal for display. A record medium in which a plurality of such helical tracks are …
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 March 25, 1992 and granted September 11, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 25, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 25, 2014.
- 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.