Patents by Inventor Patrick Dyson

Patrick Dyson 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).

  • Method and apparatus for verifying the integrity of a file stored separately from a computer
    Patent number: 5050212
    Abstract: A method and apparatus for verifying a file stored separately from a computer to be identical with a previous version of the file, before using the file. This verification is done by following a defined procedure to generate a first identifier based on the contents of the previous version of the file, storing this identifier locally on the computer, and storing the file at a separate storage location. Then, at a later time, an unverified second file is retrieved from the separate storage location, the same defined procedure is followed to generate a second identifier, and the first and second identifiers compared to identify a match that verifies the integrity of the second file.
    Type: Grant
    Filed: June 20, 1990
    Date of Patent: September 17, 1991
    Assignee: Apple Computer, Inc.
    Inventor: Patrick Dyson