Blackboard Plays Defense For a Change, as Company Is Sued for...

TechRadium, which makes emergency-notification software, filed suit against Blackboard last month in U.S. District Court in Texas, claiming that similar software sold by Blackboard violates TechRadium's patent. Blackboard began selling notification software this year when it purchased NTI Group, maker of a system used at more than 200 colleges.

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Blackboard filed a patent in 1999 for software with features that many college leaders say were already in use by other colleges and companies. This year a federal judge in Texas sided with Blackboard in its patent fight against a competitor called Desire2Learn, banning Desire2Learn from selling its then-current version of its software in the United States.

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