Patents by Inventor Hal Ottesen

Hal Ottesen 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).

  • Hybrid geothermal and fuel-cell system
    Publication number: 20060053794
    Abstract: A hybrid energy system heats or cools a plant with a geothermal unit powered at least partly by a fuel cell, which may also power other devices. The thermal fluid for the geothermal unit also cools the fuel cell via a heat exchanger. A digital controller bypasses a variable portion of the thermal fluid around the heat exchanger to regulate the fuel-cell temperature.
    Type: Application
    Filed: January 31, 2005
    Publication date: March 16, 2006
    Inventors: James Licari, Hal Ottesen, Jim Walters