Patents by Inventor Andrew C. Leppard

Andrew C. Leppard 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).

  • Combining hash-based duplication with sub-block differencing to deduplicate data
    Patent number: 8442942
    Abstract: In one embodiment, a method includes accessing data; partitioning the data into sub-blocks; determining whether a first one of the sub-blocks is identical to another one of the sub-blocks or similar to another one of the sub-blocks; if the first one of the sub-blocks is identical to another one of the sub-blocks, applying by the one or more computer systems hash-based deduplication to storage of the first one of the sub-blocks with respect to the other one of the sub-blocks; and, if the first one of the sub-blocks is similar to another one of the sub-blocks, applying by the one or more computer systems sub-block differencing to storage of the first one of the sub-blocks with respect to the other one of the sub-blocks.
    Type: Grant
    Filed: March 25, 2010
    Date of Patent: May 14, 2013
    Inventor: Andrew C. Leppard
  • Combining Hash-Based Duplication with Sub-Block Differencing to Deduplicate Data
    Publication number: 20110238635
    Abstract: In one embodiment, a method includes accessing data; partitioning the data into sub-blocks; determining whether a first one of the sub-blocks is identical to another one of the sub-blocks or similar to another one of the sub-blocks; if the first one of the sub-blocks is identical to another one of the sub-blocks, applying by the one or more computer systems hash-based deduplication to storage of the first one of the sub-blocks with respect to the other one of the sub-blocks; and, if the first one of the sub-blocks is similar to another one of the sub-blocks, applying by the one or more computer systems sub-block differencing to storage of the first one of the sub-blocks with respect to the other one of the sub-blocks.
    Type: Application
    Filed: March 25, 2010
    Publication date: September 29, 2011
    Applicant: QUANTUM CORPORATION
    Inventor: Andrew C. Leppard