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Vending machine accountability system

  • US 4,272,757 A
  • Filed: 04/05/1979
  • Issued: 06/09/1981
  • Est. Priority Date: 04/05/1979
  • Status: Expired due to Term
First Claim
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1. An accountability system for a vending machine having means for vending products, means for crediting the value of deposited monies, means for comparing the credit with the price of the product for determining the sufficiency of the credit and any excess of credit, and means for dispensing change equal to any excess of credit;

  • the accountability system comprising digital data processor means for collecting transaction data, an in-site data file for storing the transaction data, an exchangeable, portable data file module for recording the transaction data stored in the in-site data file, means for updating the data in the portable data file module prior to removal and exchange of the module, means for recording an identification of the particular vending machine in the portable data file module, means to inhibit operation of the vending machine in the absence of a portable data file module, and means to lock the portable data file module in place in the vending machine, the lock means being controlled by the data processor.

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