Patents by Inventor Tamotsu Kogo

Tamotsu Kogo 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 phase comparator for use in a phase lock loop
    Patent number: 5124594
    Abstract: A Digital Phase Comparator has a simplified logic circuit in which Nand Circuits provide UP and DOWN signals containing phase information about E and F signals.
    Type: Grant
    Filed: July 17, 1991
    Date of Patent: June 23, 1992
    Assignee: Sony Corporation
    Inventors: Hiroshi Numata, Tamotsu Kogo, Shinichi Kitazono, Fumio Ishikawa, Akira Sato