Patents by Inventor Robert A. Kellen

Robert A. Kellen 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).

  • Inductor structure with integral components
    Patent number: 5083236
    Abstract: An inductor structure, that houses a shorted transmission line inductor, includes components mounted within the volume carrying the shorted transmission line. Dielectric substrate layers which carry the shorted transmission line components and the electronic devices when sandwiched together can be coated with a metallic layer that acts as a shield protecting the internal components from external undesired sources. Mounting components within the inductor volume potentially saves space on a circuit board.
    Type: Grant
    Filed: September 28, 1990
    Date of Patent: January 21, 1992
    Assignee: Motorola, Inc.
    Inventors: Marc K. Chason, Robert A. Kellen, Leng H. Ooi, George Revtai
  • Piezoelectric monolithic crystal element having improved response
    Patent number: 4149102
    Abstract: A piezoelectric monolithic crystal filter operating in the trapped energy mode and having a capacitor plated on the piezoelectric wafer within energy coupling distance of the main electrodes has its output response improved by trapping wave energy, at the frequencies of the main electrodes, engendered by the capacitor and conducting such energy to the edges of the piezoelectric wafer where it is dissipated. Such energy is therefore not coupled into the filter structure and does not appear as an undesirable response.
    Type: Grant
    Filed: October 31, 1977
    Date of Patent: April 10, 1979
    Assignee: Motorola, Inc.
    Inventor: Robert A. Kellen