The patent holder on the karaoke machine is Roberto del Rosario, that's in the Philippines. He formulated the karaoke's sing-together procedure in 1975 and it is regarded as the only real holder of a patent for any karaoke program on the planet.[20] Later on developments[edit] ● Runs on RoomOS to https://xn--939au0g6rj1ue34n9rrf5c.online/