Patents by Inventor Patricio E. Donoso

Patricio E. Donoso 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).

  • Patent number: 4392755
    Abstract: In a method and apparatus for magnetic printing on plain paper, using a dot matrix format, a sheet of paper is positioned on the surface of a thin, elongated strip platen of permanent magnet material and a magnetic printhead scans the platen, magnetizing dot size portions of the platen in dot matrix patterns defining magnetic images of the data characters in a line of text; limited quantities of toner are applied to the paper to develop those images as visible characters on the paper. After development, the platen is displaced transversely of the paper surface to an inactive position, permitting movement of the paper, without disturbance of the developed images, to bring the line of developed character images to a separate fixing station at which fixing is effected without incurring the possibility of damage to the platen.
    Type: Grant
    Filed: February 10, 1982
    Date of Patent: July 12, 1983
    Assignee: Extel Corporation
    Inventor: Patricio E. Donoso