Blackboard 138 Patent in the Ether?

Barry Dahl, Desire2Blog, Nov 17, 2010
Commentary by Stephen Downes

Barry Dahl notices that the infamous Blackboard '138 patent is no longer listed on the company's patent page, and ponders the implications of this. My take: it means "case closed" and I can go back to thinking of Blackboard as just another technology company.
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