Patents by Inventor Randall K. Rieckenberg

Randall K. Rieckenberg 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).

  • Degaussing system for bulk demagnetization of previously magnetized materials
    Patent number: 4617603
    Abstract: The item to be demagnetized is placed in a chamber surrounded by electrical windings defining a pair of coils that are disposed in a mutually orthogonal configuration. Currents for the two coils are developed in a microprocessor-controlled inverter circuit and are applied through semiconductor switches in such a way that the resulting demagnetizing field is rotating and follows a predetermined amplitude variation in accordance with one or more profiles stored in the memory of the microprocessor.
    Type: Grant
    Filed: February 27, 1985
    Date of Patent: October 14, 1986
    Assignee: IXI Laboratories, Inc.
    Inventors: Ronald R. Johnson, Randall K. Rieckenberg