Nordelius writes "Desire2Learn has responded to the patent infringement claim (PDF) cited by Blackboard Inc. regarding eLearning systems. They have argued that Blackboard was negligent in not submitting details of prior art with their patent application, and further alleged that the material described by the patent was documented in 1998 (PDF) by a collaborative international organization, IMSprogram.org, which was actually working with Blackboard at the time."
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