{
  "patent_number": "US 1788434",
  "country": "US",
  "title": "Leonarde Keeler's Early Mechanical Blood Pressure Recorder",
  "original_title": "Apparatus for recording arterial blood pressure",
  "summary": "A 1925 invention by Leonarde Keeler designed to mechanically record a patient's arterial blood pressure over time.",
  "what_it_does": "The device functions as a specialized mechanical apparatus for monitoring and documenting arterial blood pressure. It uses a pressure-sensitive mechanism to track fluctuations in a patient's pulse and blood flow. By translating these physical movements into a readable format, it allows clinicians to observe changes in pressure without constant manual observation.",
  "what_it_does_not_cover": [
    "Does not cover electronic or digital blood pressure sensors.",
    "Does not cover automated cuff inflation systems found in modern monitors.",
    "Does not cover methods for analyzing blood pressure data using software or algorithms."
  ],
  "filed": "1925-07-30",
  "granted": "1931-01-13",
  "expires": "1948-01-13",
  "status": "expired",
  "holder": "Individual",
  "holder_url": "https://patentbrief.org/company/individual",
  "inventors": [
    {
      "name": "Keeler Leonarde",
      "url": "https://patentbrief.org/inventor/keeler-leonarde"
    }
  ],
  "times_cited": 4,
  "tags": [
    "biotech",
    "mechanical"
  ],
  "abstract": null,
  "url": "https://patentbrief.org/patent/us/1788434/polygraph-lie-detector-keeler",
  "markdown_url": "https://patentbrief.org/patent/us/1788434/polygraph-lie-detector-keeler/md",
  "google_patents_url": "https://patents.google.com/patent/US1788434",
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}