Patents by Inventor Johann Giesl

Johann Giesl 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).

  • Circuit for the continuous watching of the grounding resistance of electrical appliances
    Patent number: 4709164
    Abstract: A circuit for the continuous watching of the grounding resistor of electrical appliances whose electrically conductive parts which may be touched, such as especially the casing are connected to a ground potential by a protecting conductor, one of the live leads (R,N) of the appliance (12) being connected with the protecting conductor by way of a series connection of at least one precision resistor (R1) for measuring purposes, one test pulse generator (TG), and one capacitor (C.sub.B).
    Type: Grant
    Filed: March 25, 1986
    Date of Patent: November 24, 1987
    Assignee: Elektromanufaktur Zangenstein Hanauer GmbH & Co.
    Inventor: Johann Giesl