| 1962 UNITED AIRCRAFT CORP Collective Pitch Bias |
| 1953 UNITED AIRCRAFT CORP Pitch Lock Mechanism |
| 1968 CESSNA AIRCRAFT CO Variable Pitch Propeller |
| 1946 UNITED AIRCRAFT CORP Pitch Changing Mechanism |
| 1946 DEHAVILLAND AIRCRAFT Variable Pitch Propeller |
| 1962 UNITED AIRCRAFT CORP Pitch Lock Disarmer |
| 1952 UNITED AIRCRAFT CORP Pitch Lock Actuating Valve |
| 1952 DEHAVILLAND AIRCRAFT Variable Pitch Airscrew |
| 1960 UNITED AIRCRAFT CORP Overspeed Pitch Lock |
| 1969 UNITED AIRCRAFT CORP Rotor Blade Pitch Lock |
| 1964 UNITED AIRCRAFT CORP Pitch Changing Mechanism |
| 1958 UNITED AIRCRAFT CORP Mechanical Pitch Lock |
| 1963 UNITED AIRCRAFT CORP Governed Pitch Lock |
| 1960 BEECH AIRCRAFT CORP Variable Pitch Propeller |
| 1953 UNITED AIRCRAFT CORP Pitch Lock Patent |
| 1942 DEHAVILLAND AIRCRAFT Variable Pitch Propeller |
| 1965 UNITED AIRCRAFT CORP Pitch Control System |
| 1958 UNITED AIRCRAFT CORP Propeller Pitch Stop Lock |
| 1968 LOCKHEED AIRCRAFT CORP Micrometer Pitch Link |
| 1962 UNITED AIRCRAFT CORP Cyclic Pitch Control |
| 1944 DEHAVILLAND AIRCRAFT Variable Pitch Airscrew |
| 1970 UNITED AIRCRAFT CORP Cyclic Pitch Actuator |
| 1955 UNITED AIRCRAFT CORP Propeller Pitch Lock |
| HELI-MAX BLADE BALANCER & MINIATURE AIRCRAFT PITCH GAUG |