Patents by Inventor Haruya Kitagawa

Haruya Kitagawa 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).

  • Numerical analysis device and numerical analysis program
    Patent number: 8793293
    Abstract: A second derivative of a second-order differential equation is calculated at a reference variable value. The second derivative is multiplied by an analytical small variable value, the first derivative at the reference variable value is added, and a result is output as a first derivative after an increment of the analytical small variable value. The first derivative after an increment of the analytical small variable value is multiplied by the analytical small variable value, a physical value at the reference variable value is added, and a result is output as a physical value after an increment of the analytical small variable value.
    Type: Grant
    Filed: November 4, 2011
    Date of Patent: July 29, 2014
    Assignee: Hokuriku Electric Power Company
    Inventors: Hiroaki Sono, Nobuhiro Yamada, Haruya Kitagawa, Tsuyoshi Nomura
  • NUMERICAL ANALYSIS DEVICE AND NUMERICAL ANALYSIS PROGRAM
    Publication number: 20120047192
    Abstract: A second derivative of a second-order differential equation is calculated at a reference variable value. The second derivative is multiplied by an analytical small variable value, the first derivative at the reference variable value is added, and a result is output as a first derivative after an increment of the analytical small variable value. The first derivative after an increment of the analytical small variable value is multiplied by the analytical small variable value, a physical value at the reference variable value is added, and a result is output as a physical value after an increment of the analytical small variable value.
    Type: Application
    Filed: November 4, 2011
    Publication date: February 23, 2012
    Inventors: Hiroaki SONO, Nobuhiro Yamada, Haruya Kitagawa, Tsuyoshi Nomura
  • Numerical analysis device and numerical analysis program
    Publication number: 20090063597
    Abstract: A second derivative of a second-order differential equation is calculated at a reference variable value. The second derivative is multiplied by an analytical small variable value, the first derivative at the reference variable value is added, and a result is output as a first derivative after an increment of the analytical small variable value. The first derivative after an increment of the analytical small variable value is multiplied by the analytical small variable value, a physical value at the reference variable value is added, and a result is output as a physical value after an increment of the analytical small variable value.
    Type: Application
    Filed: March 22, 2006
    Publication date: March 5, 2009
    Inventors: Hiroaki Sono, Nobuhiro Yamada, Haruya Kitagawa, Tsuyoshi Nomura