George H. Miley is a professor of nuclear engineering and a cold fusion researcher who claims to have replicated the Patterson power cell. During the 2011 World Green Energy Symposium, Miley stated that his device continuously produces several hundred watts of power. Earlier results by Miley have not convinced mainstream researchers, who believe that they can be explained by contamination or by misinterpretation of data. 
On Good Morning America, Quintin Bowles, professor of mechanical engineering at the University of Missouri–Kansas City, claimed in 1996 to have successfully replicated the Patterson power cell. In the book Voodoo Science, Bowles is quoted as having stated: "It works, we just don't know how it works."
A replication has been attempted at Earthtech, using a CETI supplied kit. They were not able to replicate the excess heat. They looked for cold fusion products, but only found traces of contamination in the electrolyte.