Patents by Inventor Walter R. Lopes

Walter R. Lopes 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).

  • Heating system
    Patent number: 7523873
    Abstract: A closed heating system drawing external power from a small electric generator. The heating system contains a hydraulic fluid drawn through restrictors and pumped through a heat transfer means attached to a means for circulating a heated fluid through a household.
    Type: Grant
    Filed: November 4, 2004
    Date of Patent: April 28, 2009
    Inventor: Walter R. Lopes