Patents by Inventor Armin Plath

Armin Plath 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).

  • Method for detecting defects in work pieces and facility and magnetic field measuring apparatus for implementing said method
    Patent number: 6411085
    Abstract: A depth and other characteristics of a ferromagnetic impurity in a workpiece of nonmagnetic material can be determined after demagnetizing of the workpiece by magnetizing the workpiece in a uniform field, preferably to saturation, and thereafter taking measurements of the field strength from the impurity at two different distances, forming a quotient or ratio of the measured values and determining the depth from a curve in which the signal ratio or quotient is plotted against the depth.
    Type: Grant
    Filed: April 18, 2000
    Date of Patent: June 25, 2002
    Assignees: Forschungszentrum Julich GmbH, Rolls-Royce Deutschland LTD & CO KG
    Inventors: Michael Siegel, Yuri Tavrin, Karl Schreiber, Armin Plath