Patents by Inventor Ray J. Martin

Ray J. Martin 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).

  • Locating devices, systems, and methods using frequency suites for utility detection
    Patent number: 11960047
    Abstract: A method for locating buried utilities in a utility locator is disclosed. The method may include receiving, at an antenna array for receiving magnetic field signals, a plurality of magnetic field signals at predefined signal frequencies in a predefined frequency suite, generating, in a receiver coupled to an output of the antenna array, a first receiver output signal, generating, in a processing element coupled to the receiver, a first set of data associated with the two or more signal components, and storing, in a non-transitory memory of the locator, the first set of data.
    Type: Grant
    Filed: July 19, 2021
    Date of Patent: April 16, 2024
    Assignee: SEESCAN, INC.
    Inventors: Mark S. Olsson, Stephanie M. Bench, Michael J. Martin, Ray Merewether, Paul Wisecaver, Austin Rutledge
  • Controller for battery charger
    Patent number: 4746852
    Abstract: A controller for a battery charger terminates battery charging operation as a function of a time derivative of measured battery voltage. The controller has analog and digital embodiments. A controller with means for determining a time derivative of the measured battery voltage, determining a change in slope of the time derivative, and using said change in slope as a control function for the battery charger.
    Type: Grant
    Filed: September 3, 1985
    Date of Patent: May 24, 1988
    Assignee: Christie Electric Corp.
    Inventor: Ray J. Martin