Patents by Inventor Sumihiro Ohkawa

Sumihiro Ohkawa 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 transfer apparatus and method
    Patent number: 6496583
    Abstract: A converting processing block (4B/5B CONVERTER & ARB. SIGNAL CONVERTER) functions as a 4 bit/5 bit converting unit for performing 4 bit/5 bit conversion of data and as an arbitration signal converting unit for allocating 5-bit symbols other than 5-bit symbols allocated to data to arbitration signals to enable the sending/reception of the arbitration signals and packet data as 5-bit code data. There are also provided scrambling blocks (SCRAMBLE 1, SCRAMBLE 2) 4A, 4B and descramble blocks (DESCRAMBLE 1, DESCRAMBLE 2) 5A, 5B between the 4 bit/5 bit converting unit and the arbitration signal converting unit on one hand and the input/output port on the other hand to inhibit unneeded radiations in a transmission channel.
    Type: Grant
    Filed: December 28, 1998
    Date of Patent: December 17, 2002
    Assignee: Sony Corporation
    Inventors: Akira Nakamura, Sumihiro Ohkawa, Hiroshi Takiduka