Patents by Inventor Chisato Kurusu

Chisato Kurusu 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).

  • Cathode ray tube apparatus having focusing grids with horizontally and vertically oblong through holes
    Patent number: 4814670
    Abstract: The present invention relates to a cathode ray tube apparatus which can reduce an astigmatism caused from the deflection distortion by providing its focusing grid in two parts and producing a dynamic focusing lens of a quadrupole between the opposing faces of the two focusing grid parts. One focusing grid preferably has vertically disposed oblong through holes, while the other focusing grid preferably has one or more horizontally disposed oblong through holes.
    Type: Grant
    Filed: October 17, 1985
    Date of Patent: March 21, 1989
    Assignee: Matsushita Electronics Corporation
    Inventors: Hiroshi Suzuki, Masao Natsuhara, Chisato Kurusu
  • Cathode ray tube
    Patent number: 4542320
    Abstract: Distance between the second grid (G2) and the third grid (G3) is selected very short and electron beam passing apertures of the second grid (G2) and the third grid (G3) are selected small; the cathode ray tube has small beam spot both at small current and large current operations.
    Type: Grant
    Filed: February 13, 1984
    Date of Patent: September 17, 1985
    Assignee: Matsushita Electronics Corporation
    Inventors: Hiroshi Suzuki, Masao Natsuhara, Chisato Kurusu