Patents by Inventor Christopher Derrick Cawthorne

Christopher Derrick Cawthorne 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).

  • File system for a computer and method of synchronizing sets of files
    Patent number: 6473767
    Abstract: A file system for a computer supports a plurality of directories, each maintaining a list of data files as a plurality of directory entries. As well as means for creating data entries for real data files, the system includes means for creating anti-file directory entries having an attribute indicating there is no real data file corresponding to the entry. Entries may-be moved between directories and when an anti-file and a data file of the same name are present in the same directory, the real data file is deleted. This enables the synchronization of sets of target and source files to take account of changes.
    Type: Grant
    Filed: April 26, 2000
    Date of Patent: October 29, 2002
    Assignee: International Business Machines Corporation
    Inventors: Nicholas Raymond Bailey, Christopher Derrick Cawthorne, Richard John Gadd, Robert Harris