Patents by Inventor Michael Tomoyuki Hayashi

Michael Tomoyuki Hayashi 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).

  • Video inversion detection apparatus and method
    Patent number: 5930361
    Abstract: An apparatus/method for descrambling a TV cable system transmission that been scrambled using an unknown scrambling algorithm. Insertion apparatus inserts a known visual/electrical characteristic into the TV transmission prior to scrambling by the unknown scrambling algorithm. The scrambled TV transmission, the scrambled insert-characteristic, and an encrypted message that defines the unscrambled insert-characteristic, are sent to all set-tops within the cable system. A set-top descrambler at each system-authorized set-top operates to descramble the scrambled insert-characteristic. The encrypted message is decrypted at each system-authorized set-top, to thereby reproduce the unscrambled insert-characteristic.
    Type: Grant
    Filed: December 31, 1996
    Date of Patent: July 27, 1999
    Assignee: Time Warner Cable, a division of Time Warner Entertainment Company, L.P.
    Inventors: Michael Tomoyuki Hayashi, Michael Brian Adams, Louis Dew Williamson