Cache data consistency mechanism for workstations and servers with an i/o cache
CA 2030888 C · Owner: Sun Microsystems, Inc. · Inventors: Van Loo, William C.; Watkins, John; Labuda, David
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Hardware and software improvements in workstations which utilize a cache for increasing the throughput of Direct Memory Access (DMA) I/O on an operating system supporting multiple concurrent I/O operations. In a workstation or server having an operating system supporting multiple concurrent I/O operations performance may be improved significantly by including a write back cache for I/O as one of the systems elements. Such write back cache supports external devices with at least two types of device interfaces: a standard system bus interface and a network control interface through a unique combination of hardware and software support while maintaining data consistency between the I/O cache …
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 November 26, 1990 and granted April 30, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 26, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 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
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.