The patent holder of your karaoke device is Roberto del Rosario, that's within the Philippines. He formulated the karaoke's sing-alongside method in 1975 which is regarded as the sole holder of a patent for the karaoke technique on the globe.[20] Afterwards developments[edit] The K Museum of Up to date Artwork https://xn--939au0g6rj1ue34n9rrf5c.online/