|
US2620888A
|
|
Blade tracking mechanism for lifting rotors
|
|
US2520268A
|
|
Sustaining rotor for rotating wing aircraft
|
|
US2539562A
|
|
Rotating wing aircraft
|
|
US2531598A
|
|
Balancing means for rotating wing
|
|
US2546881A
|
|
Control system for rotating wing aircraft
|
|
US2468913A
|
|
Airplane and helicopter sustained aircraft
|
|
US2475121A
|
|
Airscrew
|
|
US2429975A
|
|
Amphibian supporting and propelling structure for aircraft and the like
|
|
US2595504A
|
|
Means for producing thrust
|
|
US2369652A
|
|
Helicopter
|
|
US2219288A
|
|
Rotative wing aircraft
|
|
US1854391A
|
|
Automatic navigator
|
|
US1963457A
|
|
Latitude and longitude meter
|
|
US1889273A
|
|
Automatic banking control
|
|
US1860402A
|
|
Altitude control
|
|
US1882730A
|
|
Automatic steering device
|
|
US1910738A
|
|
Locking and clearing mechanism for calculating machines
|
|
US1601337A
|
|
Flying machine
|
|
US1615002A
|
|
Airship
|
|
CA443142A
|
|
Helicopter
|
