System for performing a serializing control of a reference to a main storage
CA 2000435 C · Owner: Fujitsu Limited · Inventors: Inoue, Aiichiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
When a serialization is requested by a particular CPU the situation is divided into two cases. In the first case, the particular CPU is locked to prevent the main storage access. In the second case, the particular CPU can perform the fetch of the data without waiting for completion of the serialization. When a serialization is requested by a particular CPU after a "STORE", the particular CPU notifies the serialization to other CPUs. When the serialization is notified from other CPUs to the particular CPU, then the particular CPU lets the following fetch wait until the serialization of the other CPUs is completed. If serialization is not notified from other CPUs then the particular CPU …
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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 October 11, 1989 and granted April 9, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 11, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 11, 2011.
- 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.