Patents by Inventor C. David Callahan, II

C. David Callahan, II 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).

  • Representation and manipulation of errors in numeric arrays
    Patent number: 8751877
    Abstract: In an embodiment, a computer system accesses various different data entries in dense data array, where at least one of those data entries in the dense data array is invalid. The computer system creates an associated sparse data array that includes multiple data entries with zero values as well as data entries with non-zero values. The non-zero data entries are configured to store location information and data values for each of the invalid data entries in the dense array. The zero-value data entries are inferred from the location information of the non-zero data entries. The computer system stores the location information and data values of the non-zero data entries in the sparse data array. Those data values stored in the sparse array are proportional to the number of invalid values in the dense array.
    Type: Grant
    Filed: November 18, 2011
    Date of Patent: June 10, 2014
    Assignee: Microsoft Corporation
    Inventors: Sudarshan Raghunathan, C. David Callahan, II, Adam P. Jenkins
  • REPRESENTATION AND MANIPULATION OF ERRORS IN NUMERIC ARRAYS
    Publication number: 20130132783
    Abstract: In an embodiment, a computer system accesses various different data entries in dense data array, where at least one of those data entries in the dense data array is invalid. The computer system creates an associated sparse data array that includes multiple data entries with zero values as well as data entries with non-zero values. The non-zero data entries are configured to store location information and data values for each of the invalid data entries in the dense array. The zero-value data entries are inferred from the location information of the non-zero data entries. The computer system stores the location information and data values of the non-zero data entries in the sparse data array. Those data values stored in the sparse array are proportional to the number of invalid values in the dense array.
    Type: Application
    Filed: November 18, 2011
    Publication date: May 23, 2013
    Applicant: MICROSOFT CORPORATION
    Inventors: Sudarshan Raghunathan, C. David Callahan, II, Adam P. Jenkins