Patents by Inventor V. O. de Haan

V. O. de Haan 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).

  • Apparatus for determining properties of an electrically conductive object
    Patent number: 6275030
    Abstract: Eddy currents are generated in an object constructed of a conductive material by transmitting an electromagnetic signal to the object and detecting electromagnetic signals generated by eddy currents induced in the object, and an electromagnetic signal V(t) is described by a product of two factors F and G(t), wherein F is a function of the geometry and electrical and magnetic properties of the material and G(t) is a function of geometry of the material, the electrical and magnetic properties of the material, the thickness perpendicular to the surface of the material, and time.
    Type: Grant
    Filed: November 9, 1999
    Date of Patent: August 14, 2001
    Assignee: Röntgen Technische Dienst B.V.
    Inventor: V. O. de Haan