Roberto del Rosario

Roberto Legaspi del Rosario ( – 2003 ) was a Filipino entrepreneur; best known as the patentholder of the Sing-Along System, a type of karaoke appliance he developed in 1975. From his entrepreneurial initiative to patent a karaoke system first, he frequently, albeit arguably, became referred to as "the inventor of Karaoke" in the Philippines.

Patent rights to karaoke Roberto Legaspi del Rosario held the patent to the Sing-along System, a type of karaoke he developed in 1975, and was consequently recognized as the sole patent holder of the karaoke system worldwide. The prototype was initially dubbed as the "one-man combo". He developed the system as a teaching aid for his students in his singing school. He became widely credited in the Philippines as the "inventor of the karaoke". Elsewhere the credit goes to the Japanese.