Patents by Inventor Carl Maendel

Carl Maendel 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).

  • Furnace
    Patent number: 4292933
    Abstract: A furnace with a combustion compartment and a heat exchanger compartment connected by a channel having a secondary air inlet for efficiently burning wood and absorbing the heat of combustion.
    Type: Grant
    Filed: November 8, 1979
    Date of Patent: October 6, 1981
    Assignee: Hutterian Society of Brothers
    Inventors: Daniel Meier, Carl Maendel