Patents by Inventor Aloth U. Stratford

Aloth U. Stratford 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).

  • Structural building components
    Patent number: 5553421
    Abstract: Prefabricated, preferably pre-cast concrete, stringers and treads can be employed to provide either a staircase of any required inclination, a horizontal walkway or a ramp of a required inclination. In all these applications, the same standardized stringers and treads can be effectively used. Stanchions can be added as required. Further embodiments can be used for providing ladders and for providing seating for grand stands or theaters.
    Type: Grant
    Filed: May 18, 1994
    Date of Patent: September 10, 1996
    Inventor: Aloth U. Stratford