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Appliance retrofit monitoring device with a memory storing an electronic signature

  • US 6,934,862 B2
  • Filed: 01/08/2001
  • Issued: 08/23/2005
  • Est. Priority Date: 01/07/2000
  • Status: Expired due to Fees
First Claim
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1. A device for monitoring an appliance that receives power from a power source, the device comprising:

  • a first coupler that couples the device to the power source;

    a second coupler that couples the device to the appliance;

    a monitoring circuit connected between the first coupler and the second coupler to monitor power supplied by the source to the appliance, the monitoring circuit including a memory that stores an electronic signature of the appliance and a processor that determines an operating state of the appliance based on the electronic signature; and

    a communications circuit connected to the monitoring circuit, wherein the monitoring circuit provides data based on the monitored power to the communications circuit.

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