Patents by Inventor Andreas Wiegand

Andreas Wiegand 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).

  • Patent number: 10673542
    Abstract: A method for controlling an electrical load by means of pulse width modulation, (PWM) includes specifying a setpoint switching frequency fsetpoint and a setpoint duty ratio dsetpoint and determining the carrier frequency fch of a radio transmitter. The actual switching frequency fsw of the PWM is adapted to the carrier frequency fch of the radio transmitter in such a way that a multiple k*fsw of the actual switching frequency fsw is equal to the carrier frequency fch with an integer factor k. The actual switching frequency fsw is set to the value closest to the setpoint switching frequency fsetpoint for which the amplitude of the harmonics k*fsw in the harmonic spectrum of the actual switching frequency fsw is smaller than the amplitudes of their closest lower (k?1)*fsw and upper (k+1)*fsw adjacent harmonics.
    Type: Grant
    Filed: August 16, 2019
    Date of Patent: June 2, 2020
    Assignee: Leopold Kostal GmbH & Co. KG
    Inventors: Norbert Hees, Andreas Bendicks, Marc Wiegand, Stephan Frei
  • Publication number: 20190372683
    Abstract: A method for controlling an electrical load by means of pulse width modulation, (PWM) includes specifying a setpoint switching frequency fsetpoint and a setpoint duty ratio dsetpoint and determining the carrier frequency fch of a radio transmitter. The actual switching frequency fsw of the PWM is adapted to the carrier frequency fch of the radio transmitter in such a way that a multiple k*fsw of the actual switching frequency fsw is equal to the carrier frequency fch with an integer factor k. The actual switching frequency fsw is set to the value closest to the setpoint switching frequency fsetpoint for which the amplitude of the harmonics k*fsw in the harmonic spectrum of the actual switching frequency fsw is smaller than the amplitudes of their closest lower (k?1)*fsw and upper (k+1)*fsw adjacent harmonics.
    Type: Application
    Filed: August 16, 2019
    Publication date: December 5, 2019
    Applicant: Leopold Kostal GmbH & Co. KG
    Inventors: Norbert Hees, Andreas Bendicks, Marc Wiegand, Stephan Frei
  • Patent number: 7179660
    Abstract: A polysaccharide coated carrier having a coating of at least two successive layers of polysaccharide. The first polysaccharide layer spontaneously associates with a second polysaccharide layer and, optionally, the carrier. Each successive layer of polysaccharide spontaneously associates with a preceding layer. Spontaneous association occurs due to the presence of oppositely charged functional groups on each layer of polysaccharide or due to a spontaneous reaction between the functional groups the layers. The carrier may be any surface such as a tube, microtitration plate, bead, particle or the like and is suitable for use in diagnostic or therapeutic methods.
    Type: Grant
    Filed: March 6, 2000
    Date of Patent: February 20, 2007
    Assignee: Dade Behring Marburg GmbH
    Inventors: Hrair Kirakossian, John S. Pease, Carsten Schelp, Marcel R. Pirio, Uwe Stöhr, Andreas Wiegand
  • Patent number: 6750032
    Abstract: The invention relates to a method and to a diagnostic agent for detecting hemostasis disturbances, wherein, as a consequence of blood platelet aggregation, clot formation and/or clot dissolution, substances are brought to a distance from each other which permits or prevents an interaction, in particular an energy transfer, between the substances, and the extent of the interaction is measured.
    Type: Grant
    Filed: September 27, 2002
    Date of Patent: June 15, 2004
    Assignee: Dade Behring Marburg GmbH
    Inventors: Michael Kraus, Carsten Schelp, Andreas Wiegand
  • Publication number: 20030027235
    Abstract: The invention relates to a method and to a diagnostic agent for detecting hemostasis disturbances, wherein, as a consequence of blood platelet aggregation, clot formation and/or clot dissolution, substances are brought to a distance from each other which permits or prevents an interaction, in particular an energy transfer, between the substances, and the extent of the interaction is measured.
    Type: Application
    Filed: September 27, 2002
    Publication date: February 6, 2003
    Applicant: Dade Behring Marburg GmbH
    Inventors: Michael Kraus, Carsten Schelp, Andreas Wiegand
  • Patent number: 6482653
    Abstract: The invention relates to a method and to a diagnostic agent for detecting hemostasis disturbances, wherein, as a consequence of blood platelet aggregation, clot formation and/or clot dissolution, substances are brought to a distance from each other which permits or prevents an interaction, in particular an energy transfer, between the substances, and the extent of the interaction is measured.
    Type: Grant
    Filed: June 26, 2000
    Date of Patent: November 19, 2002
    Assignee: Dade Behring Marburg GmbH
    Inventors: Michael Kraus, Carsten Schelp, Andreas Wiegand
  • Patent number: 6187594
    Abstract: The invention relates to a method and to a diagnostic agent for detecting hemostasis disturbances, wherein, as a consequence of blood platelet aggregation, clot formation and/or clot dissolution, substances are brought to a distance from each other which permits or prevents an interaction, in particular an energy transfer, between the substances, and the extent of the interaction is measured.
    Type: Grant
    Filed: December 18, 1998
    Date of Patent: February 13, 2001
    Assignee: Dade Behring Marburg GmbH
    Inventors: Michael Kraus, Carsten Schelp, Andreas Wiegand
  • Patent number: 6087187
    Abstract: The present invention relates to a piezoelectric sensor for use in diagnostic and analytic processes, in particular for the immunochemical detection of diagnostically relevant specific binding partners.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: July 11, 2000
    Assignee: Dade Behring Marburg GmbH
    Inventors: Andreas Wiegand, Norbert Madry, Carsten Schelp, Paul Meller, Michael Mohlen
  • Patent number: 5783455
    Abstract: The present invention relates to a method for carrying out immunochemical reactions and to regenerable solid phases which can be used for this purpose. When use is made of precious metals, preferably gold, as the solid phase, and also of certain reducing agents or oxidizing agents, such as, for example, sodium borohydride and tetrabutylammonium hydroxide, with or without the addition of detergents, the solid phase can be employed repeatedly, following regeneration.
    Type: Grant
    Filed: October 12, 1995
    Date of Patent: July 21, 1998
    Assignee: Behring Diagnostics GmbH
    Inventors: Andreas Wiegand, Rudolf Schmidtberger