Patents by Inventor Donald B. McGregor

Donald B. McGregor 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).

  • Alignment tool for mounting door lock assembly
    Patent number: 5081771
    Abstract: An alignment tool for preparing through holes in a door to enable mounting a lock assembly includes a slidable bracket for securely positioning the tool in the mortise at the edge of the door. An angle element is connected to the bracket and to a support plate, which is perpendicularly disposed relative to the bracket. The support plate is formed with precisely positioned guide holes that indicates to the door installer exactly where the through holes are to be made.
    Type: Grant
    Filed: May 24, 1991
    Date of Patent: January 21, 1992
    Inventors: Donald B. McGregor, Michael W. Davis, Russell J. Bernard