4. Rotary kinetic fluid motors or pumps
  5. With shaft connected fluid force subjected thrust balancing...

John P. Kerr

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Method and apparatus for reducing axial thrust in centrifugal pu

Rotary kinetic fluid motors or pumps – With shaft connected fluid force subjected thrust balancing...
Patent

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Unmanned remotely piloted aircraft

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