At the present time, only three of Epson’s 16 related inkjet cartridge patent-infringement lawsuits filed inU.S. district courts since 2016 are ongoing. These include its lawsuit against InkJet2U LLC and Worf Corporation; its lawsuit against CIS Systems, Absolute Inkjet Incorporated, Anthony K. Martin, and Joseph J. Ascaridis; and its lawsuit against STS Refill Technology, STS