{
  "patent_number": "US 1469997",
  "country": "US",
  "title": "A 1920s Design for a Suspended Monorail Transportation System",
  "original_title": "Monorail system",
  "summary": "A 1923 patent by May B. Cornwall describing a structural design for a suspended monorail train system intended for efficient passenger or cargo transport.",
  "what_it_does": "The patent outlines a mechanical configuration for a monorail system where a vehicle is suspended from a single overhead track. It details the interaction between the carriage assembly and the rail to ensure stability while moving along a singular path. The design focuses on the physical support structure required to keep the car balanced and moving smoothly despite the lack of a traditional two-rail foundation.",
  "what_it_does_not_cover": [
    "Does not cover modern magnetic levitation (maglev) propulsion systems.",
    "Does not cover automated switching mechanisms for complex multi-line rail networks.",
    "Does not cover the electrical power distribution systems used in modern transit."
  ],
  "filed": "1922-02-17",
  "granted": "1923-10-09",
  "expires": null,
  "status": "active",
  "holder": "MAY B CORNWALL",
  "holder_url": "https://patentbrief.org/company/may-b-cornwall",
  "inventors": [
    {
      "name": "Cornwall May Bushall",
      "url": "https://patentbrief.org/inventor/cornwall-may-bushall"
    }
  ],
  "times_cited": 7,
  "tags": [
    "mechanical",
    "automotive"
  ],
  "abstract": null,
  "url": "https://patentbrief.org/patent/us/1469997/iletin-insulin",
  "markdown_url": "https://patentbrief.org/patent/us/1469997/iletin-insulin/md",
  "google_patents_url": "https://patents.google.com/patent/US1469997",
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}