Patents by Inventor Bernard Colman

Bernard Colman 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).

  • Adjustable mold for the manufacture of concrete elements such as staircases
    Patent number: 4714231
    Abstract: The present invention has as an object an adjustable mold for the manufacture of concrete elements such as staircases of the type having a straight line extent, of which the treads are perpendicular or not perpendicular to the risers.
    Type: Grant
    Filed: April 8, 1986
    Date of Patent: December 22, 1987
    Inventor: Bernard Colman