Guest Post by Prof. Yelderman: Which Kinds of Printed Publications Invalidate Patents in Court?

Stephen Yelderman is a Professor of Law at the University of Notre Dame Law School. Continuing our study of prior art in the district court, in this post we’ll take a closer look at printed publications. As I discussed in my original post, around 13% of anticipation invalidations and 34% of obviousness invalidations rely on art in this category. (The numbers may be a touch higher than that, as a result of invalidations for which we could not determine the prior art supporting the court’s conclusion). For more background on this project, you can find the full paper here. The potential sweep of this prior art category is breathtaking. By the terms of the statute—both before and after the America Invents Act—a printed publication found anywhere in the world can qualify as prior art. Moreover, under Federal Circuit precedent, this category includes a number of things that would seem to stretch the colloquial meaning of “publication.” For example,…

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