Patents by Inventor Mary E. Dunn

Mary E. Dunn 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 for generating a reference signal from unique servo mark pattern detection
    Patent number: 5293276
    Abstract: A plurality of data sequences having patterns distinguishable from informational data are recorded as a servo mark portion of servo information on a disk. Upon decoding a predetermined number of these data sequences, a determination is made as to whether an accurately located servo mark has been detected. The detected servo mark provides a reference from which the beginning of recorded servo burst data can be located, thereby enabling all of the servo burst data to be read. The presence of defects does not inhibit the detection of the servo mark.
    Type: Grant
    Filed: January 24, 1992
    Date of Patent: March 8, 1994
    Assignee: Fujitsu Limited
    Inventors: Mary E. Dunn, David E. Norton, Jr.