Patents by Inventor Franz Lappe

Franz Lappe 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: 4368421
    Abstract: The device for measuring the moisture content of a sheet-like sample consists of a microwave oscillator, microwave transmitter and microwave receiver. At least three horn transmitters are flanged via an attenuator, directional couplers and attenuators to a frequency modulated microwave oscillator, opposite each of the horn transmitters, which are fixed on a frame, a microwave receiver with detector is arranged on the same frame, and a reference detector is flanged, via an attenuator, to at least one of the directional couples. The microwave receivers can be arranged so that they can be moved on the frame.
    Type: Grant
    Filed: August 6, 1980
    Date of Patent: January 11, 1983
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Siegfried Glander, Franz Lappe