Judging by this article alone, I'd say "prior art".
>However, the plaintiffs came forward with minimal evidence to support their argument of infringement. They also faced abundant evidence showing that the patents were invalid based on prior art. In other words, there was nothing new in these “inventions” sufficient for a patent.
>However, the plaintiffs came forward with minimal evidence to support their argument of infringement. They also faced abundant evidence showing that the patents were invalid based on prior art. In other words, there was nothing new in these “inventions” sufficient for a patent.