Patents by Inventor Frank H. Bridgers

Frank H. Bridgers 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 conditioning system
    Patent number: 4071080
    Abstract: An air conditioning system comprising a heat exchanger using the conduction principle to impart a portion of the heating or cooling from the air exhausted from a building or facility to a make-up air supply and a heat pump which provides supplemental heating or cooling for the make-up air supply to bring it to the desired temperature for use in the building or facility.
    Type: Grant
    Filed: January 14, 1976
    Date of Patent: January 31, 1978
    Inventor: Frank H. Bridgers