Patents by Inventor Melvyn John Judd

Melvyn John Judd 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).

  • Apparatus for sieving a particulate material
    Patent number: 5921400
    Abstract: An apparatus for sieving a particulate material into selected size fractions. This apparatus includes a screen for separating the particulate material into an undersize fraction and an oversize fraction, and having an inlet end and an outlet end. The apparatus further includes a rotating/oscillating drive for rotating or oscillating the screen about an axis thereof, and a twin phase drive for driving the screen in a vertical direction and an axial direction.
    Type: Grant
    Filed: July 16, 1997
    Date of Patent: July 13, 1999
    Inventor: Melvyn John Judd