Patents by Inventor Stefan Heesch

Stefan Heesch 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).

  • Device for the detection of liquid surfaces
    Patent number: 5705815
    Abstract: Device for the detection of liquid surfaces including a light source sending light onto a liquid surface, an oscillation element which is moved toward the liquid surface and causes the liquid surface to oscillate upon contact with the surface. The surface contact is detected by a light detector which picks up the radiation reflected by the liquid. Upon contact with the liquid, the light sent out by the light source is modulated by the oscillations of the liquid surface. The so modulated signal can be selectively identified by the detector.
    Type: Grant
    Filed: February 12, 1996
    Date of Patent: January 6, 1998
    Assignee: Boehringer Mannheim GmbH
    Inventor: Stefan Heesch