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Telhamoniim
Cahill first patented his Telhaminium -
Wurlitzer
The Might Wurltizer was introduced in 1910 -
Theremin
It was invented in 1920 and the instrument is played by the movement of hands. -
Hammonond Organ
In 1929, an American inventor named Laurens Hammond developed a new electronic instrument using the same tone-wheel process that was used in the Telharmonium. -
Ondes Martenot
It was invented by Frenchman Maurice Martenot, this was simular to the theremin but this instrument had more control over the timbre. -
Electric Guitar
Les Paul invented the solid body electric guitar.