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Blackboard, an American maker of these systems, took the... by surprise late last month when it announced it had bee... patent in the US covering 44 claims related to learning ... systems.

BBC NEWS | Technology | Patent battle over teaching tools
http://news.bbc.co.uk/1/hi/technology/4790485.stm

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Blackboard, an American maker of these systems, took the academic community by surprise late last month when it announced it had been granted a broad patent in the US covering 44 claims related to learning management systems.

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Blackboard, an American maker of these systems, took the academic community by surprise late last month when it announced it had been granted a broad patent in the US covering 44 claims related to learning management systems.