Federal Circuit Holds Blackboard Patent Claims Invalid for Indefiniteness and Failure to Disclose Sufficient Structure By Dmitriy Tishyevich – Edited by Amanda Rice Blackboard, Inc. v. Desire2Learn, Inc., No. 2008-1368, -1396 (Fed. Cir. July 27, 2009) Slip Opinion On July 27, 2009, the Court of Appeals for the Federal Circuit affirmed the United States District Court for the Eastern District of Texas’s partial summary judgment, holding that claims 1 through 35 of the patent were invalid for indefiniteness. However, the ...
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