Patents by Inventor John D. Ingraham

John D. Ingraham 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).

  • Tool for installing demountable-wall clips on wall-board panels
    Patent number: 5267391
    Abstract: An embodiment of the present invention is a hand-held tool for use by a construction worker and comprises a top plate, a main drive assembly with a return spring, and a demountable-wall drop tube insert for receiving a belt of clips. The worker places the tool flat along one edge of a wall panel with one hand and mallets an exposed end of the main drive assembly with the other hand. The resulting forward motion of the main drive assembly snags a single clip from the drop tube insert, separates the clip from the belt, and drives a barbed end of the clip squarely into the wall panel.
    Type: Grant
    Filed: January 8, 1993
    Date of Patent: December 7, 1993
    Inventor: John D. Ingraham