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System for preventing access

  • US 20040085211A1
  • Filed: 10/30/2002
  • Published: 05/06/2004
  • Est. Priority Date: 10/30/2002
  • Status: Active Grant
First Claim
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1. A system for preventing access to a vehicle, comprising:

  • a substance detector configured to detect a level of at least one substance ingested by a user; and

    a blocking device in communication with said substance detector;

    wherein said blocking device disables the operability of at least one key; and

    wherein said blocking device enables the operability of the key when the level of the substance is measured by said substance detector to be within a predetermined range.

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