Patents by Inventor Mark L. Stephenson

Mark L. Stephenson 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).

  • Ground quality check systems and methods
    Patent number: 9588166
    Abstract: A ground check system for checking a ground conductor of a power supply comprising at least one line conductor comprises a pulse generator and a compare circuit. The pulse generator applies a test signal to a test circuit formed at least in part by the ground conductor and the at least one line conductor when an AC voltage on the at least one line conductor is approximately zero volts. The compare circuit compares the test signal passing through the test circuit with at least one test criteria indicative of an unacceptable ground.
    Type: Grant
    Filed: April 13, 2015
    Date of Patent: March 7, 2017
    Assignee: WOOD STONE CORPORATION
    Inventors: Mark L. Stephenson, Aaron Michelle
  • Ground Quality Check Systems and Methods
    Publication number: 20150293164
    Abstract: A ground check system for checking a ground conductor of a power supply comprising at least one line conductor comprises a pulse generator and a compare circuit. The pulse generator applies a test signal to a test circuit formed at least in part by the ground conductor and the at least one line conductor when an AC voltage on the at least one line conductor is approximately zero volts. The compare circuit compares the test signal passing through the test circuit with at least one test criteria indicative of an unacceptable ground.
    Type: Application
    Filed: April 13, 2015
    Publication date: October 15, 2015
    Inventors: Mark L. Stephenson, Aaron Michelle