The patent holder of the karaoke equipment is Roberto del Rosario, that is in the Philippines. He produced the karaoke's sing-together system in 1975 and it is recognized as the sole holder of the patent for just a karaoke process on this planet.[twenty] Afterwards developments[edit] Perched up around the 4th https://xn--939au0g6rj1ue34n9rrf5c.online/