Patents by Inventor Roger Pierre

Roger Pierre 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).

  • Retention means for dental impression trays
    Patent number: 5108286
    Abstract: A dental impression tray is provided with mold compound retention means comprising a multilayer sheet having a thin, central layer of a plastic film, a layer of a selected adhesive applied on each surface of the film respectively, and a peel-away disposable foil cover on each layer of adhesive.
    Type: Grant
    Filed: February 8, 1991
    Date of Patent: April 28, 1992
    Inventors: Richard S. Freedman, Roger Pierre