Patents by Inventor Derek William Edwards

Derek William Edwards 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).

  • Heat Pump
    Publication number: 20090126371
    Abstract: A heat pump device in which a temperature difference is established between two heat exchangers by inducing cyclical expansion and compression pulses in a working fluid vapour or gas which passes through an adsorbent porous solid located between the heat exchangers.
    Type: Application
    Filed: April 21, 2006
    Publication date: May 21, 2009
    Inventors: Richard Powell, Derek William Edwards, Andrew Wilson, Frederick Thomas Murphy, Paul David Bernard Bujac