As published on HRFM's CEPGI Blog, results from the first quarter of 2013 reveal the CEPGI to have a value of 738 granted U.S. patents which is down 45 relative to the fourth quarter total of 783, but is up 44 over the quarter from one year prior. Solar patents were barely edged out by Fuel Cell patents in the 1st quarter potentially foreshadowing a change in clean energy patent leadership this year as these technology sectors trend in opposite directions. GM was granted the highest number of clean energy patents for the first quarter.