High availability cache memory
CA 1309181 C · Owner: Lefsky, Brian · Inventors: Lefsky, Brian; Natusch, Mary E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A high availability set associative cache memory for use as a buffer between a main memory and a central processing unit includes multiple sets of cache cells contained in two or more cache memory elements. Each of the cache cells includes a data field, a tag field and a status field. The status field includes a force bit which indicates a defective cache cell when it is set. Output from a cache cell is suppressed when its force bit is set. The defective cache cell is effectively mapped out so that data is not stored in it. As long as one cell in a set remains operational, the system can continue operation. The status field also includes an update bit which indicates the update status of …
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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
- Granted October 20, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 20, 2009.
- 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.