Method for carrying out update writing and allocating a memory used for file writing on a memory carrier in the form of a chip card
CA 2529617 C · Owner: D'Athis, Thierry · Inventors: D'Athis, Thierry
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The carrying out of the invention requires the preallocation of a memory spaces (AO A6) group (DHS) to a card. The number of allocated memory spaces is greater than the number of records (E1 E6) of a related file (FHS). The number of extra-allocated memory spaces makes it possible to carry out the inventive updating operations. During the updating only new data (d7) are written on the card without loosing old data (d1). For this purpose new data (d7) are written in the memory spaces (A2) which are free of old data (d1) of the file. Said memory spaces are selected from the preallocated memory spaces. When new data is written a new descriptor (IHS2) of the file is written thereby making it …
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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 June 15, 2004 and granted November 19, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 15, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 15, 2026.
- 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.