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Twitter: Great IPO but are IP Storm Clouds on the Horizon?

The first day of Twitter's IPO was spectacular with the stock soaring 73% by the end of the first day of trading.  However, there are storm clouds on the horizon.  As reported by Ingrid Lunden in TechCrunch IBM has alleged that Twitter infringes on "at least three U.S. patents" held by IBM.   To understand this situation IPVision mapped these IBM patents as well as Twitter's own patent portfolio.