Patents by Inventor Chris R. Braathen

Chris R. Braathen 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 arrangement for saving energy in preparing hot water for household
    Patent number: 4150787
    Abstract: A method and an arrangement for saving energy in preparing hot water for household, in that warm waste water from bathtub and shower, etc. in the same household is used for preheating by means of a heat exchanger of water from the water distribution system to the water heater in the household.
    Type: Grant
    Filed: April 4, 1978
    Date of Patent: April 24, 1979
    Inventor: Chris R. Braathen