Patents by Inventor Koji Ichigaya

Koji Ichigaya 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).

  • Beam mislanding correcting system for color cathode ray tube
    Patent number: 3950671
    Abstract: A system for compensating for mislanding of electron beams on the screen of a color cathode ray tube as a result of thermal expansion of a beam selecting structure in the tube comprises electromagnetic devices provided on the tube for producing respective magnetic fields by means of a current supplied thereto so as to change the paths of the electron beams passing through the beam selecting structure, and a circuit for supplying to the electromagnetic devices a current varying in response to a difference between the temperature of the beam selecting structure and the ambient temperature about the tube.
    Type: Grant
    Filed: March 14, 1974
    Date of Patent: April 13, 1976
    Assignee: Sony Corporation
    Inventors: Koji Ichigaya, Hiromasa Machida, Masayuki Sudoh, Masami Mizuno, Yoriyoshi Awata