System and method for testing a data storage device without revealing memory content
CA 2570401 C · Owner: Randell, Jerrold R. · Inventors: Randell, Jerrold R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system and method for testing a data storage device without revealing memory content. To control the individual bits of the memory during testing each value is written into the memory according to the equation NEW_DATA = CURRENT_DATA XOR DATA_SEED such that individual bits of NEW_DATA are equal to CURRENT_DATA with selected bits inverted when the corresponding positions in DATA_SEED are high. NEW_DATA is written into the memory read out and , verified, so that all bit positions can be controlled and tested in both logic states, while NEW_DATA and CURRENT_DATA are not ascertainable by the testing software.
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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 1, 2005 and granted January 10, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 1, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.