None of Loar's original electric instruments appear to have been preserved—but Walter A Fuller, who joined Gibson in 1933 and later became Gibson's chief electronic engineer, found some of Loar's original devices when he first set up his R&D lab in the mid-1930s. He claimed that Loar's electrics had electrostatic pickups, but because they exhibited very high impedance they were extremely susceptible to humidity. According to Fuller, the pickups were round, about the size of a silver dollar and had a piece of cork on the back, by which they were glued to the underside of the top of the instrument.