Disc cartridge
CA 2013760 C · Owner: Arai, Shizuo · Inventors: Yamamoto, Hiroshi; Arai, Shizuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A disc cartridge having a cartridge body accommodating therein a record medium so that the record medium can be recorded and/or reproduced in the accommodated state a, first identifying device movably provided in the cartridge body so as to be switched from the outside so that it can close partly or wholly a rectangular window aperture formed through the cartridge body, and a second identifying device provided in the cartridge body in a half-secured condition so as to close a part of another rectangular window aperture formed through the cartridge body and which cannot be switched from the outside, wherein the first and second identifying devices indicate the kind of optical disc and data …
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 3, 1990 and granted May 30, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 3, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 3, 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.