{
  "patent_number": "US 355139",
  "country": "US",
  "title": "Josephine Cochrane's Mechanical Dishwashing Machine",
  "original_title": "Dish-washing machine",
  "summary": "A late 19th-century invention that used a pressurized water pump and a rotating rack to clean dishes mechanically, moving away from manual scrubbing.",
  "what_it_does": "The device uses a motor-driven pump to force hot, soapy water upward through a central pipe onto a wire rack holding the dishes. The rack is designed to rotate, ensuring that the pressurized water reaches every surface of the plates and cups. By containing the water within a sealed chamber, the machine automates the process of removing food residue, which was previously done entirely by hand.",
  "what_it_does_not_cover": [
    "Does not cover modern electronic sensors or automated detergent dispensers.",
    "Does not cover the use of ultrasonic waves or high-pressure steam cleaning.",
    "Does not cover internal heating elements for drying cycles.",
    "Does not cover the modern 'under-the-counter' form factor common in residential kitchens."
  ],
  "filed": null,
  "granted": "1886-12-28",
  "expires": null,
  "status": "active",
  "holder": "Josephine G. Cochrane",
  "holder_url": "https://patentbrief.org/company/josephine-g-cochrane",
  "inventors": [],
  "times_cited": 2,
  "tags": [
    "mechanical",
    "consumer_electronics"
  ],
  "abstract": null,
  "url": "https://patentbrief.org/patent/us/355139/dishwasher-cochrane",
  "markdown_url": "https://patentbrief.org/patent/us/355139/dishwasher-cochrane/md",
  "google_patents_url": "https://patents.google.com/patent/US355139",
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}