Patents by Inventor Derek James Wong

Derek James Wong 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).

  • Locator for locating a current carrying conductor
    Patent number: 8952677
    Abstract: A locator for locating a concealed conductor carrying an alternating current having at least first and second frequencies, the alternating current produced by at least one dedicated signal generator. The locator includes at least one magnetic field sensor operable to convert electromagnetic radiation from the conductor into a field strength signal; a digital analog converter configured to generate a digitized signal dependent upon the field strength signals from the magnetic field sensor; a digital signal processor configured to isolate components of the digitized signal resulting from the first frequency and the second frequency; and process the isolated components to generate one or more signals indicative of the proximity of the conductor to the detector; and an output configured to generate an audio and/or visual indication of the proximity of the conductor, wherein the isolated signal components resulting from the first frequency signal and the second frequency signal are contemporaneously processed.
    Type: Grant
    Filed: November 4, 2011
    Date of Patent: February 10, 2015
    Assignee: Radiodetection Ltd.
    Inventors: Richard David Pearson, Jeffrey Richard Thompson, Derek James Wong
  • Locator for Locating a Current Carrying Conductor
    Publication number: 20130113456
    Abstract: A locator for locating a concealed conductor carrying an alternating current having at least first and second frequencies, the alternating current produced by at least one dedicated signal generator. The locator includes at least one magnetic field sensor operable to convert electromagnetic radiation from the conductor into a field strength signal; a digital analogue converter configured to generate a digitized signal dependent upon the field strength signals from the magnetic field sensor; a digital signal processor configured to isolate components of the digitized signal resulting from the first frequency and the second frequency; and process the isolated components to generate one or more signals indicative of the proximity of the conductor to the detector; and an output configured to generate an audio and/or visual indication of the proximity of the conductor, wherein the isolated signal components resulting from the first frequency signal and the second frequency signal are contemporaneously processed.
    Type: Application
    Filed: November 4, 2011
    Publication date: May 9, 2013
    Applicant: RADIODETECTION, LTD.
    Inventors: Richard David Pearson, Jeffrey Richard Thompson, Derek James Wong