Patents by Inventor Christophe Durfresne

Christophe Durfresne 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).

  • Device for detecting movements of an object surface
    Publication number: 20040149894
    Abstract: A movement detection device, intended particularly for a computer mouse or a hand-held scanner, includes a light source (7) associated with a prism (8) having a non-uniformly plane reflective face. One thus obtains an as uniform as possible illumination of the field (4) of the object whose movements will be detected. An optical system (9) inserted between the field and the optoelectronic sensor (13) fixed to a printed circuit board (6) is mounted on a support (12) fixed to the board.
    Type: Application
    Filed: November 25, 2003
    Publication date: August 5, 2004
    Inventors: Pierre Tschirren, Gilles Mathieu, Christophe Durfresne, Giovanni Longa