Dresser-Rand
     http://www.dresserrand.com

Pratt&Whitney
     http://www.pratt-whitney.com

GE Aircraft Engines
     http://www.ge.com/en/company/businesses/ge_aircraft_engines.htm

Rollsroyce
      http://www.rollsroyce.com

Elliott
     http://www.elliott.com

Solar Turbines
     http://esolar.cat.com

The Revak companies
     http://www.revak.com/Default.htm

Barber-Nichols
     http://www.barber-nichols.com/clients.htm

MSI's
     http://www.mechsol.com/html/ch/chcomp.html#Failed%20Compressor%20Impeller

Capstone Turbine Corporation
     http://www.microturbine.com