4. Aeronautics and astronautics
  5. Aircraft structure
  6. Airfoil construction

Robert L. Crowell

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Collapsible portable platform

Chairs and seats – Collapsible chair; i.e. – relatively folding bottom – back,... – Back and legs collapse independently
Reexamination Certificate

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Collapsible portable platform

Chairs and seats – Collapsible chair; i.e. – relatively folding bottom – back,... – Collapsed to a compact bundle having all rigid elongated...
Reexamination Certificate

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Sailing wing

Ships – Watercraft with means used in providing sailpower – Having specifically defined hull shape
Patent

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Stunt kite dihedral wing

Aeronautics and astronautics – Kites
Patent

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Wing structure with self-induced camber

Aeronautics and astronautics – Aircraft structure – Airfoil construction
Patent

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Profile ID: LFUS-PAI-P-1386260

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