The patent holder in the karaoke device is Roberto del Rosario, who's from the Philippines. He produced the karaoke's sing-alongside procedure in 1975 and it is recognized as the sole holder of a patent for your karaoke program on the planet.[twenty] Later developments[edit] These gadgets often support advanced features, including https://xn--939au0g6rj1ue34n9rrf5c.online/