Patents by Inventor Sachio Igawa

Sachio Igawa 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).

  • Laminate LC filter having combined condenser and coil functions
    Patent number: 5367275
    Abstract: An LC filter is provided which includes a first conductive sheet, a first dielectric sheet laminated on the first conductive sheet, a second conductive sheet laminated on the first dielectric sheet, a second dielectric sheet laminated on the second conductive sheet, a third conductive sheet laminated on the second dielectric sheet, and a third dielectric sheet laminated on a third conductive sheet formed as an integral body which has the first, the second and the third conductive sheets and the first, the second and the third dielectric sheets, are coiled. The first and the second conductive sheets are respectively provided with input terminals and output terminals.
    Type: Grant
    Filed: March 5, 1993
    Date of Patent: November 22, 1994
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Mitsunobu Esaki, Shigefumi Kimura, Chiharu Miyazaki, Sunao Hiraki, Katsumi Tomiyama, Naoto Oka, Hironobu Tsutsumi, Sachio Igawa, Toshio Ootake, Mitsuhiko Kanda
  • Laminate LC filter having combined condenser and coil functions
    Patent number: 5227746
    Abstract: An LC filter is provided which includes a first conductive sheet, a first dielectric sheet laminated on the first conductive sheet, a second conductive sheet laminated on the first dielectric sheet, a second dielectric sheet laminated on the second conductive sheet, a third conductive sheet laminated on the second dielectric sheet, and a third dielectric sheet laminated on a third conductive sheet formed as an integral body which has the first, the second and the third conductive sheets and the first, the second and the third dielectric sheets, are coiled. The first and the second conductive sheets are respectively provided with input terminals and output terminals.
    Type: Grant
    Filed: January 23, 1992
    Date of Patent: July 13, 1993
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Mitsunobu Esaki, Shigefumi Kimura, Chiharu Miyazaki, Sunao Hiraki, Katsumi Tomiyama, Naoto Oka, Hironobu Tsutsumi, Sachio Igawa, Toshio Ootake, Mitsuhiko Kanda