Patents by Inventor Daniel J. Hagler

Daniel J. Hagler 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).

  • Patent number: 7055055
    Abstract: There is described a method of maintaining a record of changes to data on a recording medium and allowing reconstruction of the state of the medium at a prior time.
    Type: Grant
    Filed: April 24, 2000
    Date of Patent: May 30, 2006
    Assignee: Symantec Corporation
    Inventors: Eric D. Schneider, Michael J. Gustafson, Daniel J. Hagler