Vivi-Tone

Vivi-Tone was a musical instrument company formed in partnership by former instrument designer for Gibson Guitar Corporation, Lloyd Loar, Lewis A. Williams, and Walter Moon.

The company was incorporated in Kalamazoo, Michigan on November 1, 1933, with executive offices in Detroit.

[1] Though the company brought forth many innovative ideas in instrument design, it was ultimately commercially unsuccessful.

[2][3] Vivi-Tone produced guitars, violins, mandolins, an electric keyboard,[4] and at least one amplifier (the so-called "Aggrandizer").

Another acoustic-electric guitar design from the mid-1930s had essentially a plank body, making it one of the very early examples of a solid body guitar.