Patents by Inventor Thomas W. Schrepfer

Thomas W. Schrepfer 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).

  • Method and device for determining the concentration of a substance in body liquid
    Patent number: 7693561
    Abstract: For measuring the concentration of a substance in body fluid, such as the glucose level in blood or tissue, a strip electrode (18) and a ring electrode (19) are arranged at the specimen. The ring electrode (19) is in direct electrical contact with the specimen while the strip electrode (18) is electrically insulated therefrom. The strip electrode (18) is arranged parallel to an arm or a leg for obtaining a large interaction length. The electrodes (18, 19) form a capacitor in a resonant circuit. A modulated voltage in the MHz range close to or at the resonance frequency is applied to the electrodes and the response of the body fluid is measured. This design allows a measurement of high accuracy.
    Type: Grant
    Filed: March 6, 2001
    Date of Patent: April 6, 2010
    Assignee: Solianis Holding AG
    Inventors: Thomas W. Schrepfer, Andreas Caduff, Etienne Hirt, Heinz Süsstrunk
  • Impedance spectroscopy based systems and methods
    Patent number: 7315767
    Abstract: One aspect of the invention provides a device that non-invasively determines the concentration of a substance in a target. The device includes a first electrode, a measuring circuit, and a data processor. In one embodiment of the device, the first electrode can be electrically insulated from the target, e.g., a cover layer of insulating material covers the first electrode.
    Type: Grant
    Filed: September 5, 2003
    Date of Patent: January 1, 2008
    Assignee: Solianis Holding AG
    Inventors: Andreas Caduff, Etienne Hirt, Thomas W. Schrepfer
  • Impedance spectroscopy based systems and methods
    Publication number: 20040147819
    Abstract: One aspect of the invention provides a device that non-invasively determines the concentration of a substance in a target. The device includes a first electrode, a measuring circuit, and a data processor. In one embodiment of the device, the first electrode can be electrically insulated from the target, e.g., a cover layer of insulating material covers the first electrode.
    Type: Application
    Filed: September 5, 2003
    Publication date: July 29, 2004
    Inventors: Andreas Caduff, Etienne Hirt, Thomas W. Schrepfer
  • Method and device for determining the concentration of a substance in body liquid
    Publication number: 20040065158
    Abstract: For measuring the concentration of a substance in body fluid, such as the glucose level in blood or tissue, a strip electrode (18) and a ring electrode (19) are arranged at the specimen. The ring electrode (19) is in direct electrical contact with the specimen while the strip electrode (18) is electrically insulated therefrom. The strip electrode (18) is arranged parallel to an arm or a leg for obtaining a large interaction length. The electrodes (18, 19) form a capacitor in a resonant circuit. A modulated voltage in the MHz range close to or at the resonance frequency is applied to the electrodes and the response of the body fluid is measured. This design allows a measurement of high accuracy.
    Type: Application
    Filed: October 2, 2003
    Publication date: April 8, 2004
    Inventors: Thomas W. Schrepfer, Andreas Caduff, Etienne Hirt, Heinz Susstrunk