Data replication based upon a non-destructive data model
CA 2474752 C · Owner: Barnett, Russell Clark · Inventors: Ngo, J. Thomas; Barnett, Russell Clark
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a data-replication system, multi-way synchronization of copies of the data at different devices is achieved by employing a non-destructive data model. In this model, each replicated data object is represented by a revision graph and every operation that is performed on a data object e.g. a revision of , data content or deletion of the object is represented by adding a node to a , revision graph at the device where the change is made. Synchronization between multiple devices is achieved by applying a graph union operator. Since the union operator is commutative and associative it avoids the limitations , normally associated with the order in which updates occur. A synchronization …
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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 31, 2003 and granted March 19, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 31, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 31, 2025.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.