Patents by Inventor Stephen David Utterback

Stephen David Utterback has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Apparatus and method for monitoring the output of a warning or indicator light
    Patent number: 7154403
    Abstract: An operational status detection system for a railroad warning device having a warning light, comprising: a photodiode configured to generate a signal corresponding to a light output of the warning light of the railroad warning device; an amplifier for increasing a signal strength of the signal and providing an output corresponding to the signal; a filter for receiving the output, the filter being configured to only allow portions of the output corresponding to the light output of the warning light to be presented as an output signal of the warning light; and a microcontroller receptive to the output signal and for comparing the output signal to a threshold value, the threshold value corresponding to an acceptable light output of the warning light.
    Type: Grant
    Filed: June 30, 2004
    Date of Patent: December 26, 2006
    Assignee: General Electric Company
    Inventors: David Davenport, Daniel Stevens, Stephen David Utterback