DRM Vectors, LLC has added a case against Rakuten (d/b/a Overdrive) (1:19-cv-00878) to the campaign that it began last month with suits asserting the same patent against Alphabet (Google), Barnes & Noble, Lulu Enterprises, Microsoft, and Oracle. The patent broadly concerns a digital rights management (DRM) system that provides content from an “order server” and verifies content access privileges using an authentication server. Overdrive is accused of infringement through the exercise of DRM within its Media Console.