Patents by Inventor Katsuichi Oyama

Katsuichi Oyama 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).

  • Scheme for carrying out modular calculations based on redundant binary calculation
    Patent number: 6175850
    Abstract: A scheme for carrying out modular calculations which is capable of carrying out modular calculations using redundant binary calculation even when a number of bits of the mantissa (dividend) is larger than a number of bits of the modulus (divisor). In this scheme, the divisor c in the divisor register is left shifted by (i−j) digits when a number of digits j of the divisor c is less than a number of digits i that can be stored in the divisor register, and the modular reduction a mod c is calculated up to (i−j)-th decimal place using the dividend a and the left shifted divisor c.
    Type: Grant
    Filed: February 2, 1998
    Date of Patent: January 16, 2001
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Shinji Ishii, Kiyoto Tanaka, Katsuichi Oyama