Summary: According to a new, comprehensive report by Lex Machina, more than half of all patent lawsuits in the US now come from patent trolls.Patent lawsuits are used as weapons in business wars between companies such as Oracle vs. Google and Apple vs. Samsung. Behind the intellectual property (IP) headlines, however, Lex Machina, a Silicon Valley startup, has found that patent troll lawsuits have increased from 24 percent of cases filed in 2007 to 56% in 2012. According to the Electronic Frontier Foundation, a "patent troll uses patents as legal weapons, instead of actually creating any new products or coming...