The patent holder of your karaoke equipment is Roberto del Rosario, that is through the Philippines. He formulated the karaoke's sing-along program in 1975 which is acknowledged as the only holder of a patent to get a karaoke technique on the planet.[twenty] Later developments[edit] Video-allow your rooms at scale using https://xn--939au0g6rj1ue34n9rrf5c.online/