Patents by Inventor Richard Imhoff

Richard Imhoff 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).

  • Fail-Safe System and Test Module, Notably For Use In A Railroad Signaling System
    Publication number: 20100148805
    Abstract: A fail-safe system, notably for use in a railroad signaling system, comprising a test module with a photovoltaic coupler able to charge a capacitor. The energy stored in the capacitor provides power supply to a circuit under test. Advantageously, means of measuring a state of charge of the capacitor make it possible to quantify current leaks from the circuit under test.
    Type: Application
    Filed: November 17, 2009
    Publication date: June 17, 2010
    Applicant: Thales
    Inventor: Richard Imhoff