Patents by Inventor D. W. Poag

D. W. Poag 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).

  • Light weight vault door
    Patent number: 4489663
    Abstract: This invention provides a panel for use in doors or walls of vaults or strong rooms which is lighter in weight than conventional materials while providing comparable attack resistance. The panel consists of a layer of ceramic tiles adhesively secured to an energy-absorbing backing layer. Both faces of the panel are covered by sheet metal, and when the panel is used in constructing a door, the edges of the door also have a suitable metallic covering.
    Type: Grant
    Filed: July 29, 1982
    Date of Patent: December 25, 1984
    Assignee: Canadian Patents & Development Limited
    Inventors: D. W. Poag, W. R. Merritt