Data disc and method for retrieving data recorded on data disc
CA 2033729 C · Owner: Sasaki, Norimasa · Inventors: Sasaki, Norimasa; Takagi, Koji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A data disc and a data retrieving method are provided according to which the recording format of the recorded data on the data disc and the retrieval software for, retrieving the recorded data from the disc are unified. At least the main text data including, letter or character data index data for retrieving the main text data names , of the retrievable, items and the leading addresses of the index data associated with the names of the, retrievable items, are recorded on the disc. The method includes using a disc with at least, the above data recorded on it displaying the names of the retrievable items entering the, data of retrievable items associated with the displayed names of the …
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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 7, 1991 and granted December 18, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 7, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 7, 2013.
- 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
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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.