Method and apparatus for detecting changes in raster data
CA 2011102 C · Owner: Sun Microsystems, Inc. · Inventors: Bell, Alan Eddy
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus which provides for the real time comparison of raster data. The raster data is stored in memory such that raster data corresponding to a specific X-Y coordinate location is consistently written to the, same memory location. During the process of storing the data in memory the , data, currently stored in the memory is read and compared to the data to be written into, the same location in memory. If the data is not the same the discrepancy and, location of the discrepancy is noted in a separate area of memory to be used for, subsequent analysis and the the data to be written to that location is immediately, written into the memory. The method and apparatus of the …
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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 February 26, 1990 and granted October 31, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 26, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 26, 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
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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.