{
  "patent_number": "US 3359678",
  "country": "US",
  "title": "How the Modern Frisbee Design Works",
  "original_title": "Flying saucer",
  "summary": "A 1967 patent describing the specific aerodynamic shape and raised ribs that allow a plastic disc to fly straight and steady.",
  "what_it_does": "The patent defines the geometry of a flying disc, specifically focusing on the transition from a flat center to a curved rim. It describes an upper convex surface and a lower concave surface that create lift during flight. A critical feature is the inclusion of 'air flow spoiling means,' which are concentric raised ribs on the top surface. These ribs disrupt the airflow to prevent the disc from stalling or wobbling, ensuring a more stable flight path.",
  "what_it_does_not_cover": [
    "Does not cover discs without the specific concentric raised ribs on the top surface.",
    "Does not cover non-circular aerodynamic toys.",
    "Does not cover discs that lack the defined downward curvature from the central area to the rim."
  ],
  "filed": "1965-11-01",
  "granted": "1967-12-26",
  "expires": "1985-11-01",
  "status": "expired",
  "holder": "Wham O Manufacturing Co",
  "holder_url": "https://patentbrief.org/company/wham-o-manufacturing-co",
  "inventors": [
    {
      "name": "Edward E Headrick",
      "url": "https://patentbrief.org/inventor/edward-e-headrick"
    }
  ],
  "times_cited": 137,
  "tags": [
    "mechanical",
    "consumer_electronics"
  ],
  "abstract": null,
  "url": "https://patentbrief.org/patent/us/3359678/frisbee-flying-disc",
  "markdown_url": "https://patentbrief.org/patent/us/3359678/frisbee-flying-disc/md",
  "google_patents_url": "https://patents.google.com/patent/US3359678",
  "relatedPatents": [
    {
      "patentNumber": "2776139",
      "countryCode": "US",
      "title": "How the Wiffle Ball Design Works",
      "url": "https://patentbrief.org/patent/us/2776139/wiffle-ball-mullany"
    },
    {
      "patentNumber": "3079728",
      "countryCode": "US",
      "title": "How the Hula Hoop Works",
      "url": "https://patentbrief.org/patent/us/3079728/hula-hoop-wham-o"
    },
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      "patentNumber": "2546078",
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      "url": "https://patentbrief.org/patent/us/2546078/rogallo-wing-hang-glider"
    },
    {
      "patentNumber": "2982547",
      "countryCode": "US",
      "title": "How the First Modern Water Slide Was Designed",
      "url": "https://patentbrief.org/patent/us/2982547/slip-n-slide-carrier"
    },
    {
      "patentNumber": "3005282",
      "countryCode": "US",
      "title": "How the Modern LEGO Brick Design Works",
      "url": "https://patentbrief.org/patent/us/3005282/lego-toy-brick"
    }
  ]
}