In a recent precedential decision, a split Federal Circuit (Judges Dyk and Taranto in the majority, Judge Newman, dissenting) issued a lengthy, 53-page decision, regarding the obviousness doctrine. Judge Taranto, writing for the majority, engaged in a fact-intensive analysis to determine that a ‘blocking patent’ mooted evidence of objective indicia of non-obviousness and found the patents-in-suit invalid on obviousness grounds.