Patents by Inventor Alexander Chiang-Hsia Wu

Alexander Chiang-Hsia Wu 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).

  • Charged particle modulator device and imaging methods
    Patent number: 3970452
    Abstract: An ion modulator of improved sensitivity and capable of producing copies of excellent quality is provided in the form of a conductive metal screen which is coated with an insulator and overcoated with a photoconductor. This modulator configuration is characterized by having memory capabilities, being capable of being operated in both the positive and negative modes and functioning without injection contact.
    Type: Grant
    Filed: August 30, 1974
    Date of Patent: July 20, 1976
    Assignee: Addressograph Multigraph Corporation
    Inventors: Alexander Chiang-Hsia Wu, Shou Ling Hou