Patents by Inventor Rudolf Schehrer

Rudolf Schehrer 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).

  • Attenuation-free electronic switch
    Patent number: 4163159
    Abstract: Electronic switch for use as a crosspoint in switching networks of space-division telephone exchanges where it is connected to function as an open circuit stable negative resistance provding ON-attenuation compensated signal transmission, the switch being constituted by a circuit arrangement which lends itself to monolithic integration and which, when switched off, prevents undersirable attenuation of crosspoints connected to the same row or column of the switching system.
    Type: Grant
    Filed: December 16, 1977
    Date of Patent: July 31, 1979
    Assignee: Licentia Patent-Verwaltungs G.m.b.H.
    Inventors: Erich Bachle, Rudolf Schehrer, Dietrich Hoppner