It is not uncommon for the defendant in a patent infringement action to move for a summary judgment of invalidity of the patent-in-suit. It is, however, apparently unique for the plaintiff to do so. In Re Acacia Media Technologies Corp.
Acacia filed more than twenty (20) suits alleging infringement of various claims of five patents, all of which were based on the same specification. The various cases were all transferred to the Federal District Court for The Northern District of California for proceedings under the Multi-District Litigation Rules.