Patents by Inventor Rune Christenson

Rune Christenson 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 apparatus for heat recovery
    Patent number: 3946802
    Abstract: A method and apparatus for a recovery of heat in connection with water and waste pipe systems of the kind wherein a supply pipe for supplying cold water to a water heater and a waste pipe which is supplied with waste water from different consumption points by using the waste water for preheating the cold water before the cold water is supplied to the water heater.
    Type: Grant
    Filed: October 8, 1974
    Date of Patent: March 30, 1976
    Inventor: Rune Christenson