Patents by Inventor Ralph L. Butts

Ralph L. Butts 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).

  • Differentiation of media types via leader block characteristics
    Patent number: 5325249
    Abstract: Data storage elements that present uniform external dimensions but contain media of varying types and characteristics provide variable data storage and/or recording characteristics. To differentiate between the various media that can be used within the common form factor, each data storage element is equipped with a leader block, the tape threading slot of which is uniquely dimensioned to correspond to the media contained within the data storage element.
    Type: Grant
    Filed: October 19, 1992
    Date of Patent: June 28, 1994
    Assignee: Storage Technology Corporation
    Inventors: Ralph L. Butts, Michael L. Leonhardt, Charles A. Milligan