Patents by Inventor Albert V. Crew

Albert V. Crew 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 beam memory system with improved high rate digital beam pulsing system
    Patent number: 4764818
    Abstract: An electron beam memory system comprises a substrate mounted for rotation and supporting an information storage medium. Means are provided for rotating the substrate. An electron gun comprises a field emission cathode having an emitting tip, anode means, and means for developing and applying between the tip and the anode means a predetermined accelerating potential for forming a high brightness electron source at the tip and for causing an electron beam to be formed through the anode means. The gun includes focus lens means for receiving the beam and for forming a very small yet intense electron beam probe at a predetermined first focal distance therefrom.
    Type: Grant
    Filed: February 3, 1986
    Date of Patent: August 16, 1988
    Assignee: Electron Beam Memories
    Inventor: Albert V. Crew