( January 31, 2013) -- FTC chairman Jon Leibowitz joked that he would resist using “a few colorful street names” for patent assertion entities as he opened a recent daylong workshop co-sponsored by the Justice Department and the Federal Trade Commission to explore the impact of these entities on innovation and competition. Still, he made clear he had serious concerns about PAEs, which are sometimes derisively called trolls or robber barons, because they often purchase patents from existing owners and then make money by litigating against (or licensing) manufacturers that already use the patented technology....