Patent lawsuit threatens to clip Twitter's wings

TechRadium, a little known Texas-based player in the emergency mass-notification field, didn't just wake up this month and decide to sue Twitter for patent infringement. The company says it didn't care about Twitter when the Twitterati was watching the tweets of NBA superstars, musicians, politicians and news outlets. But then TechRadium began seeing promotional materials and news accounts of companies, school districts and local governments using, or considering adopting, the microblogging service as their emergency notification system - muscling into TechRadium's wheelhouse.

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