Patents by Inventor Philippe Hammes

Philippe Hammes 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 producing a half-tone reproduction
    Patent number: 4419690
    Abstract: A half-tone reproduction of an original image is made by exposing an output surface OS such as a film wrapped around a rotating drum to a modulated, multiple-head laser scanning beam. The modulation of each scanning beam SB, SB1 is determined by a control signal derived by generating digital position signals representing the position of the scanning beam within a half-tone dot area DA of an imaginary "electronic" screen grid SG inclined at a screen angle .beta.
    Type: Grant
    Filed: August 27, 1981
    Date of Patent: December 6, 1983
    Assignee: Crosfield Electronics Limited
    Inventor: Philippe Hammes