Patents by Inventor Michel Petitfrere

Michel Petitfrere 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 producing rollers for agricultural machines
    Patent number: 6044556
    Abstract: A method of producing a roller casing of a roller has providing a plane casing blank, forming an outer helical raised structure on the plane casing blank, bending the plane casing blank with the raised structure to form a cylindrical roller casing, and connecting with one another abutting regions of the cylindrical roller casing.
    Type: Grant
    Filed: June 3, 1997
    Date of Patent: April 4, 2000
    Assignee: Claas KGaA
    Inventors: Michel Petitfrere, Jeanot Ostermann, Arsene Roth