{
  "patent_number": "US 4750",
  "country": "US",
  "title": "How Elias Howe Invented the Modern Lockstitch Sewing Machine",
  "original_title": "Improvement in sewing-machines",
  "summary": "Elias Howe's 1846 patent for the lockstitch sewing machine, which used two separate threads to create a durable stitch that revolutionized garment manufacturing.",
  "what_it_does": "The invention uses a needle with an eye at the point and a shuttle that carries a second thread. As the needle passes through the fabric, it creates a loop of thread. The shuttle then passes through this loop, locking the two threads together to form a secure stitch that does not unravel easily. This mechanism allows for rapid, automated sewing compared to traditional hand-stitching.",
  "what_it_does_not_cover": [
    "Does not cover chain-stitch machines which use only a single thread.",
    "Does not cover electric motors, as this was a purely mechanical invention.",
    "Does not cover the concept of a needle itself, only the specific eye-pointed needle configuration used with a shuttle."
  ],
  "filed": null,
  "granted": "1846-09-10",
  "expires": null,
  "status": "active",
  "holder": "Elias Howe",
  "holder_url": "https://patentbrief.org/company/elias-howe",
  "inventors": [],
  "times_cited": 2,
  "tags": [
    "mechanical",
    "consumer_electronics"
  ],
  "abstract": null,
  "url": "https://patentbrief.org/patent/us/4750/sewing-machine-howe",
  "markdown_url": "https://patentbrief.org/patent/us/4750/sewing-machine-howe/md",
  "google_patents_url": "https://patents.google.com/patent/US4750",
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}