4. Aeronautics and astronautics
  5. Aircraft, heavier-than-air
  6. Airplane sustained

William R. Bertelsen

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Air suspension system for vehicle track

Wheel substitutes for land vehicles – Combined or convertible
Patent

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Arc wing aircraft

Aeronautics and astronautics – Aircraft – heavier-than-air – Airplane sustained
Patent

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Dynamic seals for vehicle air suspensions

Motor vehicles – Special driving device – Portable track
Patent

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Segmented air-track apparatus

Wheel substitutes for land vehicles – Combined or convertible
Patent

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Surface effect vehicles and guideways therefor

Motor vehicles – Surface effect vehicles – Flexible skirt
Patent

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Profile ID: LFUS-PAI-P-301676

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