Patents by Inventor John J. Ernandez, Sr.

John J. Ernandez, Sr. 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 increasing data storage capacity via phase and amplitude modulation
    Patent number: 6735028
    Abstract: The capacity and realized data rate of a data storage medium is increased by storing multiple bits per symbol using digital modulation techniques. Both phase and amplitude modulation techniques can be applied so that each symbol includes two or more bits that are represented by in-phase and quadrature phase portions of the signal corresponding to the data on the medium.
    Type: Grant
    Filed: August 28, 2001
    Date of Patent: May 11, 2004
    Assignee: General Instrument Corp.
    Inventors: Keith Alan Rothschild, John J. Ernandez, Sr.