Patents by Inventor Ekkeh Ehrmann-Falkenau

Ekkeh Ehrmann-Falkenau 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).

  • Surface-wave filter with selectively connectable tracks to provide a variable transmission band
    Patent number: 5107234
    Abstract: A surface-wave filter that has a variable transmission band is formed of at least two parallel tracks having input and output transducers whereby the bus-bars of one transducer of one track lie at two different potentials and one bus-bar of one transducer of a further track lies at one of the two potentials. The other bus-bar is selectively connectable to the other of these potentials so that the transducer of the further track is selectively enabled or disabled. Since the tracks have different transmissions bands, the transmission band of the filter is thus, selectable by connecting and disconnecting the further track.
    Type: Grant
    Filed: November 13, 1989
    Date of Patent: April 21, 1992
    Assignee: Siemens Aktiengesellschaft
    Inventors: Ekkeh Ehrmann-Falkenau, Karlheinz Rott, Wilfried Schott, Peter Zibis