In Seiko Epson Corp. et al. v. Glory South Software Manufacturing Inc. et al. Seiko Epson Corp. has been hit with an antitrust counterclaim in its patent infringement litigation against China’s Nenistar Technology and other printer supply manufacturers over ink cartridges. The counterclaim alleges that Seiko Epson has patented features in its ink cartridges that are not novel or distinct from prior art in order to maintain monopoly and prevent others from offering competing ink cartridges for use in Epson printers.