There is one more technology with Portuguese signature granted in the USA. It’s called ACDC Cube and consists in a more compact and efficient electronic power converter. The technology was invented by a group of three Portuguese researchers: Diogo Varajão, former researcher of the Institute for Systems and Computer Engineering, Technology and Science (INESC TEC) and current Head of Research and Development (R&D) of AddVolt, Luís Miguel Miranda senior researcher of INESC TEC and Rui Esteves Araújo, INESC TEC’s researcher and Professor at the Faculty of Engineering of the University of Porto (FEUP).