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VIVI-TONE
Instruments previously built in Kalamazoo, MI circa early 1930s.
After pioneering such high quality instruments for Gibson in the 1920s (such as the F-5 Mandolin), Designer/engineer/builder Lloyd Loar founded the Vivi-Tone company to continue exploring designs too radical for Gibson. It is rumored that Loar designed a form of stand-up bass that was amplified while at Gibson, but this prototype was never developed into a production model.
Loar, along with partners Lewis A. Williams and Walter Moon started Vivi-Tone in 1933. Loar continued building his pioneering designs, such as an acoustic guitar with sound holes in the rear, but failed to find commercial success. However, it is because of his early successes at Gibson that researchers approach the Vivi - tone designs with some wonderment instead of discounting the radical ideas altogether (source: Tom Wheeler, American Guitars).