Patents by Inventor Carl W. Ranburger

Carl W. Ranburger 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).

  • Patent number: 5743579
    Abstract: A digging tool of the invention has first and second shovel blades that are aligned in face-to-face orientation and pivotally connected to move clamshell style between open and closed positions. A handle extends from each shovel blade to a grip. When the digging tool is in the open position, the handles criss-cross or overlap and converge from the blades to an overlap point and then diverge from the overlap point to the grips. In the closed position, the shovel blades close toward one another and the handles diverge relatively slightly from the shovel blades to the grips.
    Type: Grant
    Filed: December 5, 1996
    Date of Patent: April 28, 1998
    Inventor: Carl W. Ranburger