Patents by Inventor Edward J. Hager

Edward J. Hager 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).

  • Patent number: 6384614
    Abstract: A Kelvin probe system is described for measuring resistance between two locations on an electrical device, by the use of two probe assemblies that each includes two wires, wherein each probe assembly is of simplified construction, easier to use, and more reliable. Each probe assembly (110, 112) includes a single point probe tip (12) with a pointed proximal end (102) for engaging a device contact and with a distal end (106). A cable (110) with voltage and current conductors (114, 116) has distal ends (120, 122) connected to contacts of a connector, and proximal ends (130, 132) each connected to the distal end of the probe tip. Although a large current passes through the current conductor (116) and through the length of the probe tip, the resistance-caused voltage drop across the probe tip is very small and therefore does not significantly affect accuracy of a resistance measurement.
    Type: Grant
    Filed: February 5, 2000
    Date of Patent: May 7, 2002
    Assignee: Fluke Corporation
    Inventors: Edward J. Hager, Rondal K. Harmon, Jr.