Patents by Inventor Klaus Biermann

Klaus Biermann 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).

  • Fast photoconductor
    Patent number: 9018646
    Abstract: A photoconductor comprising a layer stack with a semiconductor layer photoconductive for a predetermined wavelength range between two semiconductor boundary layers with a larger band gap than the photoconductive semiconductor layer on a substrate, wherein the semiconductor boundary layers comprise deep impurities for trapping and recombining free charge carriers from the photoconductive semiconductor layer, and two electrodes connected to the photoconductive semiconductor layer, for lateral current flow between the electrodes through the photoconductive semiconductor layer.
    Type: Grant
    Filed: March 10, 2008
    Date of Patent: April 28, 2015
    Assignee: Fraunhofer-Gesellschaft zur Foederung der angewandten Forschung e.V.
    Inventors: Bernd Sartorius, Harald Kuenzel, Helmut Roehle, Klaus Biermann
  • Fast Photoconductor
    Publication number: 20110057206
    Abstract: A photoconductor having a layer stack (72) with a semiconductor layer (64) photoconductive for a predetermined wavelength range between two semiconductor boundary layers (62) with a larger band gap than the photoconductive semiconductor layer (64) on a substrate (60), wherein the semiconductor boundary layers (62) have deep impurities for trapping and recombining free charge carriers from the photoconductive semiconductor layer (64), and two electrodes connected to the photoconductive semiconductor layer (64), for lateral current flow between the electrodes through the photoconductive semiconductor layer (64).
    Type: Application
    Filed: March 10, 2008
    Publication date: March 10, 2011
    Inventors: Bernd Sartorius, Harald Kuenzel, Helmut Roehle, Klaus Biermann
  • Hydraulic control for a dividing machine tool
    Patent number: 5832807
    Abstract: A hydraulic control for a dividing machine tool, in particular a shear or cutting press, in which a damping device is provided in order to counteract a sudden downward movement of the working piston upon the cutting through of a workpiece during an operating stroke.
    Type: Grant
    Filed: December 13, 1996
    Date of Patent: November 10, 1998
    Assignees: Mannesmann Rexroth AG, Thyssen Industrie AG
    Inventors: Georg Rausch, Heinrich Wilkens, Klaus Biermann, Georg Zoller