ALEXANDRIA, Va., June 12 -- United States Patent no. 12,298,333, issued on May 13, was assigned to Parker-Hannifin Corp. (Cleveland).
"Solutionless sensor calibration" was invented by Charlene N. Gibbert (Camarillo, Calif.), Marcos Delmar (Simi Valley, Calif.) and Dean Pighin (Newbury Park, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A calibration device for a conductivity sensor for aqueous solutions. The calibration device includes a first connector configured to electrically couple with the sensor electrodes of the conductivity sensor. The connector is further configured to provide for the application of a controlled voltage across at least two of the sensor electrodes. A first resistor is conne...