The patent holder from the karaoke device is Roberto del Rosario, who is in the Philippines. He developed the karaoke's sing-along system in 1975 and is also identified as the only holder of a patent for your karaoke method on the planet.[20] Later on developments[edit] Online video-empower your rooms at https://xn--939au0g6rj1ue34n9rrf5c.online/