Patents by Inventor Shirzad Aghazadeh

Shirzad Aghazadeh 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).

  • Digital data encoding and reconstruction circuit
    Patent number: 4157573
    Abstract: A digital data encoding and reconstruction circuit is improved by substantially eliminating erroneous and unwanted data readings due to imperfections in the magnetic recording media, excessive shoulders, electronic noise and the like by the use of pulse width discrimination. Since the time between successive transitions caused by valid data is greater than the time duration between transitions caused by erroneous signals, a counter or timer is used to determine and select only transitions caused by valid data in the read signal.
    Type: Grant
    Filed: July 22, 1977
    Date of Patent: June 5, 1979
    Assignee: The Singer Company
    Inventors: Shirzad Aghazadeh, Howard L. Stahle