Patents by Inventor Norbert Pöpplow

Norbert Pöpplow 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 assembly for operating a luminous signal
    Patent number: 7026799
    Abstract: The invention relates to a circuit assembly for operating a luminous signal, particularly an LED signal, comprising at least one light-emitting diode (D) to which a resistance (R) is serially connected and a control (St) is connected in parallel. In order to adjust the luminous power of the luminous signal to various degrees of brightness during the day and at night, the control (St) is provided with a controlled source of current so as to specify a parallel current (I_P) which reduces the current (I_D) flowing through the light-emitting diode (D).
    Type: Grant
    Filed: December 5, 2002
    Date of Patent: April 11, 2006
    Assignee: Siemens Aktiengellschaft
    Inventors: Norbert Pöpplow, Dirk Zimmermann