Patents by Inventor Kent KinMan Tam

Kent KinMan Tam 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).

  • Non-contact surface conductivity measurement probe
    Patent number: 6819120
    Abstract: A non-contact probe for determining the conductivity of coating materials is disclosed. The probe includes a free running oscillator operating at a selected frequency, a sensor made up of an LC circuit, a detector for detecting a change in the LC circuit in response to change in the sensor coil induction, and a processor for converting the detected changes in the signal to surface conductivity data. The detector may be a frequency detector that detects changes in the resonant frequency of the LC circuit or the detector may be a magnitude detector that detects changes in the signal magnitude of the LC oscillator. The sensor is the coil inductor of the LC circuit. Inductance of the sensor coil is variable depending on conductivity of the material near the sensor coil.
    Type: Grant
    Filed: November 13, 2002
    Date of Patent: November 16, 2004
    Assignee: Northrop Grumman Corporation
    Inventor: Kent KinMan Tam
  • Non-contact surface conductivity measurement probe
    Publication number: 20040100277
    Abstract: A non-contact probe for determining the conductivity of coating materials is disclosed. The probe includes a free running oscillator operating at a selected frequency, a sensor made up of an LC circuit, a detector for detecting a change in the LC circuit in response to change in the sensor coil induction, and a processor for converting the detected changes in the signal to surface conductivity data. The detector may be a frequency detector that detects changes in the resonant frequency of the LC circuit or the detector may be a magnitude detector that detects changes in the signal magnitude of the LC oscillator. The sensor is the coil inductor of the LC circuit. Inductance of the sensor coil is variable depending on conductivity of the material near the sensor coil.
    Type: Application
    Filed: November 13, 2002
    Publication date: May 27, 2004
    Inventor: Kent KinMan Tam