4. Aeronautics and astronautics
  5. Aircraft, heavier-than-air
  6. Helicopter or auto-rotating wing sustained, i.e., gyroplanes

Yuriy Z. Gmirya

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Harmonic drive system for the retraction/extension of...

Fluid reaction surfaces (i.e. – impellers) – Radially extensible or retractible rotor working member
Reexamination Certificate

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Rotor drive and control system for a high speed rotary wing...

Aeronautics and astronautics – Aircraft – heavier-than-air – Helicopter or auto-rotating wing sustained – i.e. – gyroplanes
Reexamination Certificate

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Split-torque face gear transmission

Machine element or mechanism – Gearing – Directly cooperating gears
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2163566

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