Laser disk carrying case
CA 2116992 A1 · Owner: Chen, Dung I. · Inventors: Chen, Dung I.; Chan, Chin Chung
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a laser disk carrying case including two outer shells connected together to hold a disk holder which can be conveniently turned out, of the shells for storing an individual laser disk or retrieved it from the case and, then turned into the shells and locked in place. A wedge block is made on one shell, which is engaged into an opening on the base of the disk holder to lock it inside the shells. The disk holder has spring pawls on a center hole thereof to hold a laser disk on a circular mat thereof.
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 March 4, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 4, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 4, 2016.
- 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.