Patents by Inventor Paul Wetzer

Paul Wetzer 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 for identification of different states of water, and sensor arrangement for use in the method
    Patent number: 5585551
    Abstract: A sensor arrangement for identifying various states of water on a surface of a structure, comprises a sensor element and a transmitter-receiver unit. The sensor element, adapted to be placed on the surface, has two ends and is made of an acoustically conductive material. The transmitter-receiver unit is connected between the two ends of the sensor element. The transmitter-receiver unit alternately transmits acoustic signals to each of the two ends and receives acoustic signals corresponding to the transmitted signals from each of the two ends for subsequent processing.
    Type: Grant
    Filed: December 9, 1994
    Date of Patent: December 17, 1996
    Assignee: Labko Ice Detection Oy
    Inventors: Reijo Johansson, Paul Wetzer, Juhani Makinen