 Lego Canada soon sued Ritvik for unfair competition, claiming a likelihood of confusion between its Micro Mega Bloks and the Lego line.Since Lego's brick shape patent had expired, the lawsuit dragged on for years as sales grew worldwide (at an average 70% a year until the mid-1990s), but finally Ritvik won the case by clearly distinguishing its brand from Lego.Suits were filed in Europe and the U.S. with similar results.