Request cancel system
CA 2007640 C · Owner: Komatsuda, Hiroshi · Inventors: Komatsuda, Hiroshi; Nishida, Hidehiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A request cancel system is adapted to a processing system which comprises a main storage unit having a plurality of banks, a memory control unit and a plurality of access units which make access to the banks of the main storage unit via the memory control unit. The request cancel system comprises a check part for detecting whether or not a bank designated by an address of an access request from an arbitrary access unit is in use by reading a corresponding bank busy flag from a bank busy flag group, a comparator for comparing an address of a first access request and an address of a second access request which is received immediately after the first access request and for outputting a …
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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 January 12, 1990 and granted August 6, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 12, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 12, 2012.
- 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.