Compact disc case
CA 2003050 A1 · Owner: Nikkodo Co. Ltd. · Inventors: Takagi, Kisaburo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
a compact disc case including lower and upper cases fixed by snap joints with enough space left in between for storing a compact disc. The lower case has at least three cushion holders to support the compact disc up above the bottom, and for preventing improper insertion of the case into a disc player, a control groove or a control shell is provided at least in either one of the upper and lower cases. The front edge wall of the lower case is provided with engagement holes, and also latches and latch locks engaging with each other are formed at the rear of the upper and lower cases. By means of this structure the, case with a compact disc in it can be inserted into a disc player for use …
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 November 15, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 15, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 15, 2011.
- 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.