Patents by Inventor Michel Duvoisin

Michel Duvoisin 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).

  • Cycle crank gear assembly including replaceable cartridge
    Patent number: 4252384
    Abstract: A cycle crank gear assembly includes a weather sealed, preadjusted cartridge which is replaceably installed in a crank gear box in a cycle frame. A clamping or wedging device secures the cartridge in the crank gear box.
    Type: Grant
    Filed: September 4, 1979
    Date of Patent: February 24, 1981
    Assignee: Edouard Dubied & Cie SA
    Inventors: Michel Duvoisin, Charles Berthoud