Clean energy patents hit an all time high in the second quarter of 2014, according to the Clean Energy Patent Growth Index, and as depicted below:
Solar patents again led Fuel Cell patents and all other technologies in what has become a pattern the booming solar sector. Toyota and GM again traded places at the top of the patent owner chart with Toyota taking the quarterly Clean Energy patent Crown back from GM. The US led all countries in granted US clean energy patents. See the Second Quarter report for the CEPGI for more.