Patents by Inventor Andreas A. G. Duell

Andreas A. G. Duell 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).

  • Electronic volume correctors
    Patent number: 4910519
    Abstract: To obtain better accuracy, it is known to modify the mechanical metered volume reading of the flow through a gas pipeline according to the gas laws, which incorporate the pressure and temperature parameters of the gas. The present invention samples those parameters with analog sensors and inputs them into an analog to digital converter. The digital output from the converter is employed to obtain a more accurate digital volume reading.
    Type: Grant
    Filed: April 29, 1988
    Date of Patent: March 20, 1990
    Assignee: Romet Limited
    Inventors: Andreas A. G. Duell, Ignacy J. Grzeslo