Patents by Inventor Billy M. Leyland

Billy M. Leyland 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).

  • Air cooling apparatus
    Patent number: 4361525
    Abstract: An apparatus for efficiently and economically cooling air by sequentially passing the air to be cooled through a chilled water heat exchanger mechanism and then through an evaporative cooler mechanism.
    Type: Grant
    Filed: November 2, 1981
    Date of Patent: November 30, 1982
    Inventor: Billy M. Leyland
  • Air cooling apparatus
    Patent number: 4312819
    Abstract: An apparatus for efficiently and economically cooling air by sequentially passing the air to be cooled through a chilled water heat exchanger mechanism and then through an evaporative cooler mechanism.
    Type: Grant
    Filed: November 18, 1980
    Date of Patent: January 26, 1982
    Inventor: Billy M. Leyland