4. Motor vehicles
  5. Surface effect vehicles
  6. Having propulsion or control means

Herman M. Drees

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Passively stable hovering system

Motor vehicles – Surface effect vehicles – Having propulsion or control means
Patent

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Passively stable hovering system

Motor vehicles – Surface effect vehicles – Having propulsion or control means
Patent

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Rotary aircraft passively stable in hover

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

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Self-starting windmill energy conversion system

Fluid reaction surfaces (i.e. – impellers) – Sustained ancillary movement of rotary working member – Responsive to gravity or working fluid force
Patent

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Water turbine

Prime-mover dynamo plants – Fluid-current motors
Patent

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Profile ID: LFUS-PAI-P-232627

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