Patents by Inventor Robert R. Gregory

Robert R. Gregory 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).

  • Eraser crumb catcher
    Patent number: 4155310
    Abstract: An eraser crumb catcher comprising an elongated trough which is removably supported on a bracket secured along an edge of a drafting table. The trough has an inboard side which extends down from the edge of the table and an outboard side which curves up and out and then back to terminate above the edge forming a cowl or deflecter to deflect the eraser crumbs brushed from the table to the trough.
    Type: Grant
    Filed: March 13, 1978
    Date of Patent: May 22, 1979
    Inventor: Robert R. Gregory