Patents by Inventor Irving R. Tsai

Irving R. Tsai 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).

  • Method and apparatus for non-impact printing
    Patent number: 4626868
    Abstract: The present invention relates to a method and apparatus for non-impact, single-pass printing in which the toner exhibits a selective or "tuned" response to an agent having a preselected characteristic, such as light energy of a particular frequency emitted by a laser, to impart an image to a printing surface or substrate.
    Type: Grant
    Filed: February 11, 1985
    Date of Patent: December 2, 1986
    Inventor: Irving R. Tsai