AT&T, General Electric, R.F. Monolithics, Multiplex Beverage, Telex, Telsco-Weathermatic, Washex, Control Technology,  Flexible Technologies, Zebco,  Iowa Beef Processors, Shevlin Medical Inc., LeTournea, Casablanca, Teccor, Global Water Technology, Andrew, American Acrylic & Injection, MCI, Verizon, and several private investors.