The patent holder from the karaoke machine is Roberto del Rosario, who is from the Philippines. He designed the karaoke's sing-along method in 1975 and it is regarded as the only real holder of the patent for a karaoke procedure on this planet.[20] Afterwards developments[edit] Video-help your rooms at scale https://xn--939au0g6rj1ue34n9rrf5c.online/