Patents by Inventor William H. Reinhardt

William H. Reinhardt 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).

  • Seebeck cancellation switch for precision DC voltage measurements
    Patent number: 11525847
    Abstract: Systems and methods include an electrical switch that establishes a first electrical conducting path between terminals of an electrical measurement apparatus through one or more electrical leads and an electrically-conductive sample in a first state, and a second electrical conducting path between the terminals through the one or more electrical leads while bypassing the sample in a second state. A voltage VS+L is measured across all of the sample and the one or more electrical leads in the first state, while a voltage VL is measured across the one or more electrical leads while bypassing the sample in the second state. Calculations according to the equation VS=VS+L?VL are performed to determine a precision DC voltage measurement of a voltage across the sample VS in the absence of Seebeck voltage offsets contributed by the one or more electrical leads.
    Type: Grant
    Filed: September 24, 2021
    Date of Patent: December 13, 2022
    Assignee: NORTHWESTERN UNIVERSITY
    Inventors: Matthew Grayson, Chulin Wang, Juncen Li, William H. Reinhardt
  • SEEBECK CANCELLATION SWITCH FOR PRECISION DC VOLTAGE MEASUREMENTS
    Publication number: 20220099711
    Abstract: Systems and methods include an electrical switch that establishes a first electrical conducting path between terminals of an electrical measurement apparatus through one or more electrical leads and an electrically-conductive sample in a first state, and a second electrical conducting path between the terminals through the one or more electrical leads while bypassing the sample in a second state. A voltage VS+L is measured across all of the sample and the one or more electrical leads in the first state, while a voltage VL is measured across the one or more electrical leads while bypassing the sample in the second state. Calculations according to the equation VS=VS+L?VL are performed to determine a precision DC voltage measurement of a voltage across the sample VS in the absence of Seebeck voltage offsets contributed by the one or more electrical leads.
    Type: Application
    Filed: September 24, 2021
    Publication date: March 31, 2022
    Inventors: Matthew Grayson, Chulin Wang, Juncen Li, William H. Reinhardt