Patents Assigned to PPG Hellige B.V.
  • Display tube control system
    Patent number: 5053684
    Abstract: System for controlling the position and intensity of an electron beam in a display tube of a display unit in such a manner that both analog signals as well as alphanumeric characters can be made visible simultaneously on the screen of the display tube.
    Type: Grant
    Filed: May 19, 1989
    Date of Patent: October 1, 1991
    Assignee: PPG Hellige B.V.
    Inventor: Marinus A. M. Nooyen