Patents by Inventor Pierre Merville

Pierre Merville 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).

  • Self-propelled machine for the concreting of ditches
    Patent number: 5080532
    Abstract: A self-propelled machine for concreting a ditch includes a caterpillar band which contacts and rolls on the bottom of the ditch, a propulsion unit for driving the displacement belt, and a spreading system for spreading concrete on the bottom and sides of the ditch.
    Type: Grant
    Filed: April 25, 1990
    Date of Patent: January 14, 1992
    Assignee: En Treprise Merville Pierre
    Inventors: Pierre Merville, Jacques Merville