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Expired Canadian patentCanada

Method and system for increased system memory concurrency in a multiprocessor computer system

CA 2107056 C · Owner: Oehler, Richard Raphael · Inventors: Muhich, John Stephen; Kahle, James Allan; Oehler, Richard Raphael

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Abstract From the Canadian patent

A method and system are disclosed for increasing memory concurrency in a multiprocessor computer system which includes system memory, multiple processors coupled together via a bus, each of the processors including multiple processor units for executing multiple instructions and for performing read, write and store operations and an associated Translation Lookaside Buffer (TLB) for translating effective addresses into real memory addresses within the system memory. Multiple page table entries are provided within a page table within the system memory which each include multiple individually accessible fields an, effective address and an associated real memory address for a selected system …

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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 September 27, 1993 and granted June 23, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 27, 2013.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 27, 2015.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 27, 1993
GrantedJune 23, 1998
Term endedSeptember 27, 2013
Patent numberCA 2107056 C
Classification (IPC)G06F15/16 +1 more

Timeline

Timeline From CIPO dates

1994199619982000200220042006200820102012Application filedSep 27, 1993Patent grantedJune 23, 1998Term endedSep 27, 2013

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.