Patents by Inventor David H. Hauser

David H. Hauser 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).

  • Door security apparatus
    Patent number: 5724705
    Abstract: A door security device for use in securing a door against unauthorized entry. The device includes a protrusion which can be mounted to the hinge side of a door or to the hinge side of a door frame and can be received within a recess in the opposite door or door frame. The protrusion in received by the recess to prevent the door from being removed by removal of a hinge pin.
    Type: Grant
    Filed: May 9, 1996
    Date of Patent: March 10, 1998
    Inventor: David H. Hauser