Patents by Inventor Maurice Vignal

Maurice Vignal 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).

  • Method and device for thermally air-conditioning a room, a vat or the like
    Patent number: 3965694
    Abstract: The present invention is directed toward an air conditioning system having the capability of being utilized as both a heating or cooling system. At least one heat pump is provided to pump heat from a heat source to the air conditioning system to prevent freezing of the system. The heat pump also removes heat from the system, when it is used as a cooling system, and diffuses it into the earth. The earth may also be utilized as a source of heat to be supplied to the system.
    Type: Grant
    Filed: June 12, 1974
    Date of Patent: June 29, 1976
    Inventors: Maurice Vignal, Henri Chapuis