{
  "patent_number": "US 3761682",
  "country": "US",
  "title": "Early Automatic Cash Dispenser Using Credit Cards",
  "original_title": "Credit card automatic currency dispenser",
  "summary": "This 1973 patent describes a machine that dispenses cash using a coded credit card, verifies the card's validity, and updates its code after each transaction to prevent fraud.",
  "what_it_does": "This patent details a method for an automated machine to dispense cash based on a credit card. When a card is presented, the machine reads its coded data and compares it against stored verification codes to check for validity, such as bank code, expiration date, or number of uses. If the card is valid, the machine dispenses the requested currency. Crucially, after dispensing cash, the machine updates the card's coded data to reflect the transaction and then re-scrambles it with a changing key. This updated, scrambled code is then recorded onto a new document (presumably a replacement card or a receipt) that is removed from the machine. This process aims to prevent unauthorized use by ensuring the card's code is always current and unique after each transaction.",
  "what_it_does_not_cover": [
    "Dispensing cash without a coded document being presented",
    "Dispensing cash using a document that has expired or exceeded its usage limit",
    "Dispensing cash without verifying the coded data against stored codes",
    "Updating the coded data on the document after a transaction",
    "Scrambling the coded data after each transaction to prevent reuse"
  ],
  "filed": "1971-10-07",
  "granted": "1973-09-25",
  "expires": "1991-10-07",
  "status": "expired",
  "holder": "Docutel Corp",
  "holder_url": "https://patentbrief.org/company/docutel-corp",
  "inventors": [
    {
      "name": "T Barnes",
      "url": "https://patentbrief.org/inventor/t-barnes"
    },
    {
      "name": "G Chastain",
      "url": "https://patentbrief.org/inventor/g-chastain"
    },
    {
      "name": "D Wetzel",
      "url": "https://patentbrief.org/inventor/d-wetzel"
    }
  ],
  "times_cited": 36,
  "tags": [
    "consumer_electronics",
    "software",
    "finance",
    "semiconductors"
  ],
  "abstract": "A currency dispenser automatically delivers a medium of exchange in packets in response to a coded credit card presented thereto. The coded credit card is presented to the currency dispenser and an initial check is made to determine if the card has the proper format. After checking the credit card format, coded information thereon is evaluated to check the user''s identity prior to authorizing him to receive cash from the machine. When each of several additional checks of the credit card code have been completed, the old code is removed and substituted with a new code. The new code contains the same information as the old but updated to reflect an additional currency dispensing transaction. Both the original code and the updated code are scrambled in accordance with a changing key. Scrambling the credit card code after each use thereof minimizes the chance of unauthorized use of the currency dispenser. When the checks of the credit card code indicate the user is entitled to receive the amount of currency he has selected, a storage container for the packets of currency transports the required number of packets by a positive feed drive to a cash drawer. The cash drawer opens to a detent position which allows the customer to then move the drawer to a fully open position to remove his currency. Upon release of the cash drawer, it returns to a partially opened position from which it automatically closes after a preset time limit.",
  "url": "https://patentbrief.org/patent/us/3761682/atm-cash-dispenser",
  "markdown_url": "https://patentbrief.org/patent/us/3761682/atm-cash-dispenser/md",
  "google_patents_url": "https://patents.google.com/patent/US3761682",
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}