The patent holder with the karaoke equipment is Roberto del Rosario, who is from the Philippines. He designed the karaoke's sing-together process in 1975 and is acknowledged as the sole holder of a patent for a karaoke system in the world.[twenty] Afterwards developments[edit] These units usually assistance advanced capabilities, which https://xn--939au0g6rj1ue34n9rrf5c.online/