Patents by Inventor Claude Paul Henri Lerouge

Claude Paul Henri Lerouge 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).

  • Electronic dipole for looping a telephone line
    Patent number: 4037120
    Abstract: An electronic dipole circuit operating at constant current, designed to be used for looping a telephone line from a private branch exchange is disclosed. The circuit comprises a first transistor with the current which is constant in the emitter circuit owing to the presence of a second transistor. A device connected between the collector and the base of the first transistor delivers a constant current. Such a device may comprise, for example, a phototransistor or a field-effect transistor placed in series with a phototransistor.
    Type: Grant
    Filed: May 3, 1976
    Date of Patent: July 19, 1977
    Assignee: International Standard Electric Corporation
    Inventors: Joel Serge Colardelle, Marie Helene Comte, Claude Paul Henri Lerouge