Former Microsoft executive and billionaire Paul Allen sued several major Internet companies and three large retailers for patent infringement today, asserting that four patents originating at Interval Research, Allen's dot-com era think tank, cover basic web browsing and e-commerce technologies. A Wired magazine profile of Interval Research suggests that by 1999, the institute was struggling, with Allen having spent upwards of $100 million on research and not much to show for it. "Interval always had a special buzz and a collection of talent that, even in the annals of technological genius, stands out."