Roberto Del Rosario
Roberto Del Rosario is a Filipino inventor and the president of the Trebel Music Corporation. In 1975, he invented the Karaoke Sing Along System. A prolific Filipino inventor who has patented more than twenty inventions, he is also a successful businessman and a talented musician. He took up management from Far Eastern University. His inventions were product of his passion for what he does this only proves that we don’t have to be a scientist or an engineer to be an inventor or an innovator.
- Trebel Voice Color Code (VCC)
- piano tuner's guide
- piano keyboard stressing device
- voice color tape
- June 2, 1983-Patent No. UM-5269 for audio equipment and improved audio equipment commonly known as the sing-along system or karaoke
- November 14, 1986-Patent No. UM-6237 for audio equipment and improved audio equipment commonly known as the sing-along system or karaoke