Patents by Inventor Jorg Holstein

Jorg Holstein 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).

  • Patent number: 4829239
    Abstract: A multimeter comprising a clip-on device (12) and a Hall-effect measuring circuit (5) for measuring either a direct or an alternating current I. Moreover, the multimeter comprises a voltage-measuring circuit (2) for measuring either a d.c. or an a.c. voltage U as applied to two input/output combination sockets (3, 4). By means of a function transformer (30), a digitizing unit (19), a digital unit (25) and further circuit components which also include a battery-operated power-supply unit (1), the measured current and/or voltage values, by taking into due consideration any stored correcting values as well as such correcting values which result from adjusting measurements, and any circuit-specific constants as already previously stored by the manufacturer, are processed in accordance with predetermined rules for proportioning into display signal-waveform-independent values relating to the current I, the voltage U, the apparent power Ps, the real power Pw, the power factor, the frequency f, and further values.
    Type: Grant
    Filed: December 1, 1987
    Date of Patent: May 9, 1989
    Assignee: Muller & Weigert, GmbH
    Inventors: Jorg Holstein, Lothar Rapp