Method of indexing data on a sequential data storage medium
CA 2270698 C · Owner: Kom Inc. · Inventors: Shaath, Kamel; Freeman, Richard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A format structure for storing retrievable encoded data on a recording medium comprises a start field for indicating the start of a data file an index field immediately following the start field for storing indexing data respecting the data file the index field storing a sequence of one or more positions of other start fields leading in one direction from a current position on the medium toward one end of the medium and a field immediately following the index field for storage data which forms the data file. A method for storing encoded data on a storage medium comprises the steps of locating the last file stored on the medium retrieving the index field of the last stored file duplicating …
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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 April 29, 1999 and granted July 1, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 29, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 29, 2021.
- 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.