Patents by Inventor Spencer S. Hall

Spencer S. Hall 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).

  • Strap-on leveling/plumbing device kit
    Patent number: 4663856
    Abstract: A kit is provided which is primarily designed to facilitate the construction of a fence with vertical posts and horizontal rails. The kit includes a leveling/plumbing device having a central level for indicating a horizontal position, and an end level for indicating a vertical position. The device is attachable to a workpiece being positioned, by separable fasteners of the hook and loop type. The user can then use two hands to position the workpiece while observing the desired one of the levels.
    Type: Grant
    Filed: March 25, 1986
    Date of Patent: May 12, 1987
    Inventors: Spencer S. Hall, Joseph M. Kistner