| 1952 UNITED AIRCRAFT CORP Rotor Speed Governor |
| 1952 UNITED AIRCRAFT CORP Propeller Blade Patent |
| 1952 LOCKHEED AIRCRAFT CORP Variable Ratio Booster |
| 1952 UNITED AIRCRAFT CORP Pitch Lock Actuating Valve |
| 1952 LOCKHEED AIRCRAFT CORP Jet Blast Deflector |
| 1952 UNITED AIRCRAFT CORP Air Screen Jet Engines |
| 1952 UNITED AIRCRAFT CORP Gun Adapter Patent |
| 1952 UNITED AIRCRAFT CORP Antibuffet Seat Patent |
| 1952 UNITED AIRCRAFT CORP Helicopter Control Art |
| 1952 UNITED AIRCRAFT CORP Automatic Bungee Art |
| 1952 UNITED AIRCRAFT CORP Reduction Gearing Art |
| 1952 UNITED AIRCRAFT CORP Ribbed Core Steel Blades |
| 1952 UNITED AIRCRAFT CORP Flap Mechanism Patent |
| 1952 UNITED AIRCRAFT CORP Rotor Blade Support |
| 1952 UNITED AIRCRAFT CORP Adjustable Propeller Cuff |
| 1952 UNITED AIRCRAFT CORP Shrouded Tail Rotor |
| 1952 BELL AIRCRAFT CORP Aircraft Undercarriage |
| 1952 WARNER AIRCRAFT CORP Power Valve Assembly |
| 1952 UNITED AIRCRAFT CORP Surface Control System |
| 1952 UNITED AIRCRAFT CORP Rudder Pedal Installation |
| 1952 UNITED AIRCRAFT CORP Rotor Blade Patent |
| 1952 UNITED AIRCRAFT CORP Engine Mount Attachment |
| 1952 LOCKHEED AIRCRAFT CORP Aircraft Heating System |
| 1952 UNITED AIRCRAFT CORP Ionized Air Stall Detector |