Proceeding pro se, individual inventor James L. Driessen has filed suit against Best Buy (1:19-cv-03301), Target (1:19-cv-03360), and WalMart (1:19-cv-03239) in the District of DC, accusing the retailers of infringing a single patent through the sale of “digital media known as ‘DVD + Digital’ ‘Blu-ray + Digital’ and/or ‘Blu-ray + DVD+ Digital’”. The sole asserted patent generally relates to purchasing a “physical access card” for digital downloadable media material at a “retail point of sale establishment”; as to Target and Best Buy, Driessen alleges “knowledge of the invention claimed” in the patent through suits filed over a decade ago in the first cases in this campaign—cases that ended after an unfavorable invalidity ruling in the District of Utah.