Disc cartridge
CA 2015416 C · Owner: Kabushiki Kaisha Toshiba · Inventors: Takahashi, Yoshinori
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A disc cartridge of the present invention has magnetic means provided on an inner surface at least one of a pair of housing means which faces information recording means and acting on a hub for fixing a magnetic disc so that the magnetic disc is prevented from being vibrated in the disc cartridge. In consequence the present invention provides a disc cartridge which operates at a high reliability and in which foreign matter such as dust is not produced.
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 April 25, 1990 and granted December 27, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 25, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 25, 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.