Patents by Inventor Robert A. Rubke

Robert A. Rubke 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).

  • Coherent multi-frequency synthesis
    Patent number: 5128809
    Abstract: Methods and circuitry for generating sector and data cell timing frequencies for banded variable frequency sector disc drive systems with dedicated plus embedded servo positioning systems which have the timing signals synchronized to servo track information written on a dedicated surface of the disc.
    Type: Grant
    Filed: June 29, 1989
    Date of Patent: July 7, 1992
    Assignee: Digital Equipment Corporation
    Inventors: Michael D. Leis, Robert Y. Noguchi, Joseph M. Rinaldis, Robert A. Rubke