{
  "patent_number": "US 2546078",
  "country": "US",
  "title": "How the Rogallo Flexible Wing Kite Works",
  "original_title": "Flexible kite",
  "summary": "A 1948 patent for a kite with a flexible, non-rigid wing that uses air pressure to maintain its shape during flight.",
  "what_it_does": "The patent describes a kite wing made of flexible material that lacks a rigid frame. Instead of using wooden struts to hold its shape, the wing relies on the pressure of the wind to inflate and maintain an airfoil shape while tethered. This design allows the kite to be lightweight, foldable, and capable of stable flight without heavy structural supports.",
  "what_it_does_not_cover": [
    "Does not cover rigid-frame kites like traditional box or diamond designs.",
    "Does not cover motorized aircraft or powered flight vehicles.",
    "Does not cover wings made of rigid materials like metal or wood panels."
  ],
  "filed": "1948-11-23",
  "granted": "1951-03-20",
  "expires": "1968-11-23",
  "status": "expired",
  "holder": "Individual",
  "holder_url": "https://patentbrief.org/company/individual",
  "inventors": [
    {
      "name": "Rogallo Gertrude Sugden",
      "url": "https://patentbrief.org/inventor/rogallo-gertrude-sugden"
    },
    {
      "name": "Rogallo Francis Melvin",
      "url": "https://patentbrief.org/inventor/rogallo-francis-melvin"
    }
  ],
  "times_cited": 23,
  "tags": [
    "aerospace",
    "mechanical"
  ],
  "abstract": null,
  "url": "https://patentbrief.org/patent/us/2546078/rogallo-wing-hang-glider",
  "markdown_url": "https://patentbrief.org/patent/us/2546078/rogallo-wing-hang-glider/md",
  "google_patents_url": "https://patents.google.com/patent/US2546078",
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}