Patents by Inventor Katsuyoshi Ueno

Katsuyoshi Ueno 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).

  • Electron lens
    Patent number: 4468563
    Abstract: An electron lens equipped with a ferromagnetic body disposed in at least one of the pole gaps of the electron lens which serves as a switchable bypass for magnetic flux. The said ferromagnetic body is magnetically saturated under strong excitation, thereby permitting switching between the double-gap lens and the single-gap lens to be effected by changing the excitation current.
    Type: Grant
    Filed: July 6, 1982
    Date of Patent: August 28, 1984
    Assignee: JEOL Ltd.
    Inventors: Katsushige Tsuno, Katsuyoshi Ueno
  • Illumination system in a scanning electron microscope
    Patent number: 3978338
    Abstract: A scanning electron microscope comprising a double gap lens in its electron beam irradiating system. The double gap lens is arranged between the electron gun and the final stage condenser lens, and is excited by a lens current such that a large change of electron beam diameter may be controlled by a small change of lens excitation current.
    Type: Grant
    Filed: April 7, 1975
    Date of Patent: August 31, 1976
    Assignee: Nihon Denshi Kabushiki Kaisha
    Inventors: Katsuyoshi Ueno, Hirotami Koike