1. General Motors Corporation, Laminated porous metal: USA, US3584972, 1971-06-15.
2. General Motors Corporation,. Turbine blade: USA, US3619082, 1971-11-09.
3. General Motors Corporation, Cooled airfoil: USA, US3732031, 1973-05-08.
4. General Motors Corporation, Turbine cooling: USA, US3963368, 1976-06-15.
5. Rolls-Royce Limited, Cooling of aerofoil shaped blades: USA, US3620643, 1971-11-16.