Patents by Inventor Duane R. Tandeske

Duane R. Tandeske 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).

  • Pressure transducer auto reference
    Patent number: 4051712
    Abstract: A pressure transducer is automatically calibrated electronically by periodically subjecting the transducer to a reference pressure for a brief period of time. During this period of time the transducer electrical output is automatically adjusted to a level that represents the desired value for the reference pressure. The calibration can be accomplished just prior to taking a measurement or it can be accomplished at regular intervals spaced to ensure the accuracy of readings taken between calibrations.
    Type: Grant
    Filed: August 20, 1976
    Date of Patent: October 4, 1977
    Assignee: National Semiconductor Corporation
    Inventors: Arthur R. Zias, Duane R. Tandeske