Patents by Inventor Robert L. Silver

Robert L. Silver 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).

  • Material handling box having a side hopper and door
    Patent number: 4015714
    Abstract: A material handling box fabricated from sheet steel and having four generally vertical sides and a bottom wall, one of the sides being substantially open and having a hopper extending outwardly therefrom. The top of the hopper is open whereby access may be had through the open hopper top and into the interior of the box. A vertically slideable door is positioned over the opening in the side and which can be moved from a box closing position to any one of a number of vertically positioned locations to thereby expose the interior of the box to the hopper in the desired degree.
    Type: Grant
    Filed: March 10, 1976
    Date of Patent: April 5, 1977
    Assignee: Triple E Corporation
    Inventors: Robert L. Silver, Bert R. Eisenhut
  • Material handling box
    Patent number: D246871
    Type: Grant
    Filed: March 10, 1976
    Date of Patent: January 3, 1978
    Assignee: Triple E Corporation
    Inventors: Robert L. Silver, Bert R. Eisenhut