On: All 44 Blackboard Patent Claims Invalidated

I can't seem to find an overview of all of them, but here are the ones Blackboard said they wouldn't enforce against pure open source software. http://www.blackboard.com/patent/FAQ_013107.htm

I believe that their patents together meant that any commercial Blackboard-like software was infringing on their IP. This is a list of companies that were probably infringing on Blackboard's fortunately invalid patents. http://www.mfeldstein.com/the_blackboard_patent_claims_in_pl... http://www.google.com/patents?id=RX94AAAAEBAJ&dq=6,988,1... That's their first and biggest one and it's obscene.