Patents by Inventor Christopher R. Grabbe

Christopher R. Grabbe 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).

  • Near zero TCR resistor configurations
    Patent number: 8188832
    Abstract: A microchip resistor device is disclosed in which first and second resistive elements are formed on a substrate. The first resistive element has a first resistance value and a positive temperature coefficient of resistance (TCR) over a selected temperature range. The second resistive element has a second resistance value and a negative TCR over the selected temperature range. The first and second resistive elements do not overlap each other. The first and second resistive elements are operatively connected with one or more conductors to provide a current path between the two elements. The product of the first resistance value and the positive temperature coefficient of resistance is substantially equal in magnitude to the product of the second resistance value and the negative temperature coefficient of resistance.
    Type: Grant
    Filed: May 5, 2010
    Date of Patent: May 29, 2012
    Assignee: State of the Art, Inc.
    Inventors: Amitabh Das, Robert J. Hufnagel, Christopher R. Grabbe
  • Near Zero TCR Resistor Configurations
    Publication number: 20110273263
    Abstract: A microchip resistor device is disclosed in which first and second resistive elements are formed on a substrate. The first resistive element has a first resistance value and a positive temperature coefficient of resistance (TCR) over a selected temperature range. The second resistive element has a second resistance value and a negative TCR over the selected temperature range. The first and second resistive elements do not overlap each other. The first and second resistive elements are operatively connected with one or more conductors to provide a current path between the two elements. The product of the first resistance value and the positive temperature coefficient of resistance is substantially equal in magnitude to the product of the second resistance value and the negative temperature coefficient of resistance.
    Type: Application
    Filed: May 5, 2010
    Publication date: November 10, 2011
    Inventors: Amitabh Das, Robert J. Hufnagel, Christopher R. Grabbe