The patent holder from the karaoke equipment is Roberto del Rosario, who's from your Philippines. He designed the karaoke's sing-along system in 1975 and is also regarded as the sole holder of the patent for the karaoke technique on this planet.[20] Later developments[edit] The K Museum of Modern Artwork is https://xn--939au0g6rj1ue34n9rrf5c.online/