Patents by Inventor Keijiro Kusaka

Keijiro Kusaka 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).

  • Coaxial impedance transducer pad
    Patent number: 4035748
    Abstract: A coaxial impedance matching device employing film resistors in place of conventional rod and disc resistors. In a preferred embodiment, an elongated rectangular film resistor is deposited across the middle of a square insulation substrate with a pair of metal strips along opposite edges of the substrate and contacting the ends of the film resistor. Center metalized contacts are made to opposite sides of the film resistor, the lengths of contact with the sides being determined by the impedances of the cables to be connected thereto.
    Type: Grant
    Filed: September 24, 1975
    Date of Patent: July 12, 1977
    Assignee: Bunker Ramo Corporation
    Inventors: Keijiro Kusaka, Yasushi Otomo