강남도파민 Contrary to Inoue, del Rosario patented the "Sing-Alongside Technique" (issued in 1983 and 1986) and is also acknowledged as the sole holder of the patent for just a karaoke process on the earth just after he gained a patent infringement situation towards a Chinese company in the nineteen nineties. https://elliotkharj.suomiblog.com/everything-about-gangnam-51111672