Recompression server
CA 2731259 C · Owner: Aol Inc. · Inventors: Appelman, Barry
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A recompression server (20) that automatically decompresses selected pre-compressed data streams and recompresses the decompressed data to a greater degree than the original pre-compressed data. In one embodiment the recompression server (20) determines from a request whether a requested file is pre-compressed. In another embodiment the recompression server (20) determines from a retrieved requested file's name or attributes whether the file is pre-compressed. Optionally the recompression server (20) may cache frequently requested files in re-compressed form to further optimize the bandwidth of a wide area network (8). Such caching can be done on-line or off-line
Read the whole patent
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 April 11, 1997 and granted September 24, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 11, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 11, 2019.
- 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.