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Device with one or more indicators

  • US 20050083182A1
  • Filed: 10/15/2003
  • Published: 04/21/2005
  • Est. Priority Date: 10/14/2003
  • Status: Abandoned Application
First Claim
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1. A device that includes at least one consumable source that decreases in effectiveness over time, the device comprising:

  • a timer, operatively coupled to the consumable source, for maintaining the duration that the at least one consumable source is in use; and

    an effectiveness indicator, operatively coupled to the timer, for indicating when the timer has reached a preset duration.

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