Optical memory element and sheet for use with the same
CA 2024904 A1 · Owner: Okumura, Hideaki · Inventors: Ohta, Kenji; Terashima, Shigeo; Ishikawa, Toshio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sheet for use with an optical memory element having a labelling section accommodated on its external face and where inscriptions can be made with writing utensils and, an adhesive section accommodated on a reverse face and that adheres to and is detachable from a protective layer of the optical memory element. An optical memory element such that the above sheet is disposed on top of a protective layer. With such an arrangement inscriptions, can be written upon the optical memory element and changed, and the sheet can be replaced when it is stained.
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 September 7, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 7, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 7, 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.
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.