Video theater system and copy preventive method
CA 2071237 C · Owner: Kawakami, Toshikatsu · Inventors: Kimoto, Takayuki; Hosokawa, Tatsuhiro; Kawakami, Toshikatsu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a video theatre system. The system includes a video cassette which records at least a component video signal to which a copy preventive scheme has been applied. A video cassette recorder is provided for reproducing the video cassette. A tuner and an antenna provided for receiving a signal transmitted via a satellite. A controller device controls the video cassette recorder and the tuner. A unit is provided for releasing the copy preventive scheme. A projector projects a video image from which the copy preventive scheme has been released. The copy preventive scheme is applied while retaining the a synchronizing signal in the protected video signal. The copy …
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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 June 15, 1992 and granted April 21, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 15, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 15, 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.
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.