Patents by Inventor David N. Duperon

David N. Duperon 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).

  • Compound resistor manufacturing method
    Patent number: 4907341
    Abstract: This invention relates to a proces of manufacturing and adjusting a compound resistor. The compound resistor is formed of a resistive material forming a predominant portion of the resistance and having a small negative temperature coefficient of resistance coupled with an adjustment material having an extremely low resistance and a very high positive temperature coefficient of resistance. After forming the resistive and adjustment portions, a portion of the adjustment material is removed to adjust the composite TCR of the compound resistor substantially to zero without significantly affecting resistance.
    Type: Grant
    Filed: December 31, 1987
    Date of Patent: March 13, 1990
    Assignee: John Fluke Mfg. Co., Inc.
    Inventors: Roy W. Chapel, Jr., David N. Duperon
  • Compound resistor and manufacturing method therefore
    Patent number: 4803457
    Abstract: A compound resistor is formed of a resistive material making up a predominant portion of the resistance and having a small negative TCR coupled with an adjustment material having an extremely low resistance and a very high positive temperature coefficient of resistance. After the manufacturing process, a portion of the adjustment material is removed to adjust the composite TCR of the compound resistor substantially to zero without significantly affecting the resistance.
    Type: Grant
    Filed: February 27, 1987
    Date of Patent: February 7, 1989
    Inventors: Roy W. Chapel, Jr., David N. Duperon, Joseph E. Meadows