Filing the complaint with the US International Trade Commission in February of 2006, Epson accused side ink cartridge manufacturers of their products coming close to Epson’s design. Since then, many companies from Germany, Hong Kong, Korea and US decided to settle, not to fight, and stop importing aftermarket ink cartridges for Epson's printers.
Sure, the Epson reps claim they pursue unfair competition, and that they will take whatever actions necessary to protect Epson’s patents, blah-blah-blah, and Epson has been successful in its efforts to do so. Business model of inkjet printer manufacturers has long been selling cheap printers and making profit on original cartridges, it is make sense to keep the third party companies away from consumables market, since printer ink is a $32 billion market worldwide.
Given all that, no doubt Epson’s going to be persistent in taking away compatible ink cartridges manufacturers. So, soon we may have no choice but to use only costly original inks for Epson printers.