The patent holder of the karaoke machine is Roberto del Rosario, who's from the Philippines. He formulated the karaoke's sing-alongside technique in 1975 and it is identified as the only holder of a patent for a karaoke system on the earth.[20] Later on developments[edit] Numerous institutions offer karaoke over a https://xn--939au0g6rj1ue34n9rrf5c.online/