Patents by Inventor Patrick Trannois

Patrick Trannois 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 for examining the surface reliefs of a sample and apparatus for carrying out same
    Patent number: 4758730
    Abstract: The invention concerns a method for examining a sample whose surface comprises reliefs, and an apparatus for carrying out the method. The apparatus comprises a sample carrier plate subjected to illumination from at least two sources having different wavelengths and whose illumination axes form an acute angle of incidence on the sample carrier plate, the illumination axes of the sources being all different, and an observation system for the sample carried by the plate. The method may be used for measuring the effectiveness of a cosmetic treatment product on a skin.
    Type: Grant
    Filed: October 22, 1986
    Date of Patent: July 19, 1988
    Assignee: L'Oreal
    Inventors: Roland Bazin, Etienne Soudant, Patrick Trannois