Disc cartridge
CA 2059495 C · Owner: Sony Corporation · Inventors: Fujisawa, Hirotoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A disc cartridge including a cartridge body formed with an aperture for exposing at least a part of the signal recording area of an accommodated disc, and a shutter member slidably mounted on the cartridge body for opening or closing the aperture, is disclosed. The cartridge body is provided with a shutter opening groove extending along the sliding direction of the shutter member which is parallel to the direction of insertion of the disc cartridge into a recording and/or reproducing apparatus adapted for recording and/or reproducing information signals on or from the disc and a mistaken insertion, inhibiting groove extending parallel to the shutter opening groove and having a length …
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 January 16, 1992 and granted May 29, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 16, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 16, 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.