Patents by Inventor Karl-Otto Dohnke

Karl-Otto Dohnke 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 switching device having at least two semiconductor components
    Patent number: 6373318
    Abstract: An electronic switching device includes at least one first and one second semiconductor component, with a first anode connection and a second cathode connection being short-circuited. A control voltage that can be applied to a first grid connection is also at least partially present at a second grid connection. This reduces the forward resistance of the electronic switching device in the switched-on state.
    Type: Grant
    Filed: March 26, 2001
    Date of Patent: April 16, 2002
    Assignee: Siemens Aktiengesellschaft
    Inventors: Karl-Otto Dohnke, Heinz Mitlehner, Dietrich Stephani, Benno Weis
  • Electronic switching device having at least two semiconductor components
    Publication number: 20010024138
    Abstract: An electronic switching device includes at least one first and one second semiconductor component, with a first anode connection and a second cathode connection being short-circuited. A control voltage that can be applied to a first grid connection is also at least partially present at a second grid connection. This reduces the forward resistance of the electronic switching device in the switched-on state.
    Type: Application
    Filed: March 26, 2001
    Publication date: September 27, 2001
    Inventors: Karl-Otto Dohnke, Heinz Mitlehner, Dietrich Stephani, Benno Weis
  • Sensor for gases or ions
    Patent number: 4872759
    Abstract: A sensor for gases or ions with a light source, a detector and a sensor layer all of which are attached to a carrier. A thin sensor film, the absorptivity of which changes through the action of the measurement medium, is arranged on a light waveguide, the one flat side of which covers a flat end face of the light source, the end face of the carrier and a plane receiving surface of the detector. Thus, a sensitive sensor, especially for gases, is obtained in which the sensor layer, the light source and the detector form an integrated structural unit.
    Type: Grant
    Filed: July 7, 1988
    Date of Patent: October 10, 1989
    Assignee: Siemens Aktiengesellschaft
    Inventors: Eva-M. Stich-Baumeister, Karl-Otto Dohnke, Albrecht Winnacker