The version of the instrument that is most well known today is the “solid body” electric guitar: a guitar made of solid wood, without resonating airspaces within it. The first solid body electric guitar was designed by musician and inventor Les Paul, working after hours in the Epiphone Guitar factory. His “log” guitar, so called because it consisted of a simple rectangular block of wood with a neck attached to it, is generally considered to be the first solid body electric guitar. Les Paul claims to have developed his first solid body electric guitar as early as 1941.