Patents by Inventor Wolfgang Aachen

Wolfgang Aachen 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).

  • Filter system comprising a bulk acoustic wave resonator
    Publication number: 20050030127
    Abstract: The invention relates to a filter device equipped with at least one bulk acoustic wave resonator, which comprises a resonator unit and a reflection element (2) comprising several layers (6, 7, 8). The layers (6, 7, 8) each comprise a mixture of at least two materials. Within each layer (6, 7, 8), the composition of the mixture varies continuously and periodically relative to the layer thickness.
    Type: Application
    Filed: August 2, 2002
    Publication date: February 10, 2005
    Inventors: Hans Loebl, Mareike Klee, Robert Milsom, Christof Metzmacher, Wolfgang Aachen