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Road use charging apparatus

  • US 5,428,353 A
  • Filed: 04/22/1993
  • Issued: 06/27/1995
  • Est. Priority Date: 10/24/1990
  • Status: Expired due to Fees
First Claim
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1. A road use charging apparatus for use in a vehicle comprising:

  • a store for storing credit units;

    a debiter for debiting credit units in said store at a selected rate;

    an initiation control operable by a driver to initiate said debiter to debit at said selected rate;

    a visual indicator having a display showing when said debiter is operative with said credit units being debited in said store, wherein said display is positioned in the vehicle so that said display is visible from a roadside as the vehicle passes, the display being readily observable from the roadside at town driving speeds;

    an interface for interfacing with a removable credit enabling device, said credit enabling device providing a number of new credit units available for debiting; and

    a controller arranged to enable said debiter only if all the credit units available from the credit enabling device have not been debited in said store.

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