Patents by Inventor Wataru Oizumi

Wataru Oizumi 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).

  • Electrical double layer capacitor
    Patent number: 7177139
    Abstract: An electrical double layer capacitor is provided which is capable of ensuring its reliability and providing increased energy density per unit volume of a capacitor. A negative electrode is so configured as to cover all surfaces of a positive electrode and, therefore, there is no portion in which the positive electrode does not face the negative electrode, which enables generation of gas within the capacitor to be suppressed and ensures reliability of the capacitor. Portions in which the negative electrode do not face the positive electrode serve as non-covered portions and, therefore, electrostatic capacitance per unit volume of electrodes is made to increase, and energy density is improved.
    Type: Grant
    Filed: August 17, 2005
    Date of Patent: February 13, 2007
    Assignee: NEC Tokin Corporation
    Inventor: Wataru Oizumi
  • Electrical double layer capacitor
    Publication number: 20060039099
    Abstract: An electrical double layer capacitor is provided which is capable of ensuring its reliability and providing increased energy density per unit volume of a capacitor. A negative electrode is so configured as to cover all surfaces of a positive electrode and, therefore, there is no portion in which the positive electrode does not face the negative electrode, which enables generation of gas within the capacitor to be suppressed and ensures reliability of the capacitor. Portions in which the negative electrode do not face the positive electrode serve as non-covered portions and, therefore, electrostatic capacitance per unit volume of electrodes is made to increase, and energy density is improved.
    Type: Application
    Filed: August 17, 2005
    Publication date: February 23, 2006
    Inventor: Wataru Oizumi