Patents by Inventor Seyed Entezarmahdi

Seyed Entezarmahdi 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).

  • Disk servo with PLL for detecting timing deviations
    Patent number: 4849835
    Abstract: A technique and associated arrangement for detecting loss of phase/frequency lock in a phase lock loop, particularly for a magnetic disk drive servo system the phase lock loop detects timing asynchronism and loss of lock.
    Type: Grant
    Filed: March 19, 1987
    Date of Patent: July 18, 1989
    Assignee: Unisys Corporation
    Inventors: Seyed Entezarmahdi, Sassan Mortazavi