A portable espresso maker comprising a housing and a water chamber within the housing and having an o-ring mounted on the top edge. There is a heating element adjacent the bottom of the water chamber. There is a bottom tray for holding the housing and a cup positioned on the bottom tray adjacent the...http://www.google.de/patents/US6062127?utm_source=gb-gplus-sharePatent US6062127 - Portable espresso maker
