Patents by Inventor Hans Arne Bertil Liljedahl

Hans Arne Bertil Liljedahl 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 for altering the temperature of a premises and device for carrying out said method
    Patent number: 6142214
    Abstract: A method and device for altering the temperature of a premises, wherein a medium in the summertime is cooled by the cool night air and is brought into a floor layer directly under the premises for cooling the premises during the day. In order to minimize the risk of migration of moisture from the ground and upwards to the floor layer, the floor layer and an underlying foundation are cooled so that at least an upper portion of the floor layer reaches a minimum temperature which substantially exceeds the temperature of the ground under the foundation.
    Type: Grant
    Filed: March 18, 1998
    Date of Patent: November 7, 2000
    Inventor: Hans Arne Bertil Liljedahl