Patents by Inventor Kazurou Toda

Kazurou Toda 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).

  • Magnetic field measurement apparatus
    Patent number: 5075546
    Abstract: A magnetic field measurement apparatus with high sensitivity and high accuracy in which a Bi-substituted rare-earth iron garnet crystal with a high and no temperature dependent sensitivity constant grown by liquid phase epitaxy is used for a magneto-optic element.
    Type: Grant
    Filed: November 6, 1990
    Date of Patent: December 24, 1991
    Assignees: Matsushita Electric Industrial Co., Ltd., Kansai Electric Power Co., Inc.
    Inventors: Osamu Kamada, Hisashi Minemoto, Kazurou Toda, Daisuke Ishiko, Satoshi Ishizuka, Akihiro Miura
  • Current and/or voltage detector for a distribution system
    Patent number: 4999571
    Abstract: A current and voltage detector for a distribution system is provided with a lower section, an upper section and a fastener for combining the lower and upper sections into one body. The lower section comprises: a first groove for receiving an electric wire of the distribution system; an optical type current sensor; an optical type voltage sensor; and a potential divider for supplying a voltage to the voltage sensor. The upper section comprises: a second groove for receiving the electric wire; and a U-shaped magnetic core for applying a magnetic field to the current sensor.
    Type: Grant
    Filed: April 20, 1989
    Date of Patent: March 12, 1991
    Assignees: Matsushita Electric Industrial Co., Ltd., Kansai Electric Power Co., Inc.
    Inventors: Daisuke Ishiko, Kazurou Toda, Osamu Kamada, Akihiro Miura