Patents by Inventor John Massingham

John Massingham has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Memory arbitration scheme with circular sequence register
    Patent number: 6321309
    Abstract: Apparatus for arbitrating between requests from a plurality of sources for access to a shared resource, the apparatus comprising: a register means having a plurality of stages, each stage containing a designation of one of said sources, a plurality of stages containing a designation of the same source, logic means for accessing the register stages according to a priority scheme and for comparing the designation in each stage with requests for access, and granting access according to the match between the highest priority source designation and a memory request, and means for changing the contents of the register means subsequent to access grant.
    Type: Grant
    Filed: May 19, 1999
    Date of Patent: November 20, 2001
    Assignee: LSI Logic Corporation
    Inventors: Peter Bell, John Massingham, Alex Darnes