Allen Bradley, Allied, Aromat, Beckman, Bourns, Centra Lab, Clarostat, Corning, CTS, Dale, Deutch, Gardian, Hi-G, Hi-Rel, Magnecraft, Mallory, Mepco, Ohmite, P & B, Rohm, Sigma, Spectrol, Struthers & Dunn, Ultronix, Vishay