Method for modification of data on a memory card on a transaction
CA 2452672 A1 · Owner: Gerbault, Eric · Inventors: Gerbault, Eric
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method for modification of data in a card transaction system comprising a memory card and a reader for reading the card. The card comprises a first memory (RAM) and a second memory (EEPROM) with locations occupied by data recordings. Each transaction involves the modification of at least one of the data locations or the addition of a new recording. The method comprises the following steps a) read (17) the address of a free location from a previous control register located in a first fixed location in the EEPROM memory b) write (18) the new modified recording or addition in the free location repeat steps a) and b) for each new recording to be modified or added and …
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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 15, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 15, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 15, 2025.
- 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.