Write-once-read-many storage system and method for implementing the same
CA 2519280 C · Owner: Network Appliance, Inc. · Inventors: Heller, Jeffrey L.; Wagner, J. Christopher; Mcgovern, William P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A write-once-read-many (WORM) storage system that employs large-capacity and relatively inexpensive disks in connection with a file system on a file server is pro-vided. The file system contains most or all of the required WORM functionality so as to impose a minimal footprint on client applications client operating systems and open protocols if desired. The system is organized around WORM storage volumes that contain files that when committed , to WORM storage, cannot be deleted or modified. Any file path or directory tree structure used to identify the file within the WORM vol-ume is locked and cannot be deleted. In one embodiment, the administrator creates a WORM volume capable 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
- Filed March 5, 2004 and granted May 7, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 5, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 5, 2026.
- 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
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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.