Patents by Inventor C. A. Graham

C. A. Graham 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).

  • Sectional swimming pool construction
    Patent number: 4858411
    Abstract: An in-ground swimming pool is constructed of sectional panels joined by welding. The panels are formed of poured concrete having lateral ends of metal. Special configuration of internal reinforcing members prevents separation of the metal ends from the concrete body of the sectional panels.
    Type: Grant
    Filed: February 3, 1989
    Date of Patent: August 22, 1989
    Inventor: C. A. Graham