Patents by Inventor Michel Marchal

Michel Marchal 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 of making an embossed pattern on an information bearing substrate
    Patent number: 4288528
    Abstract: An improved process for forming an embossed pattern through the use of a writing concentrated beam opening holes in a film capable of undergoing residue free evaporation. A layer of photoresist is overlayed with the film and upon being exposed and processed the layer supplies the prospective embossed pattern.
    Type: Grant
    Filed: June 11, 1979
    Date of Patent: September 8, 1981
    Assignee: Thomson-CSF
    Inventors: Jean E. Picquendar, Michel Marchal, Jean C. Dubois, Eugene Duda