Patents by Inventor Leo M.J. Karkkainen

Leo M.J. Karkkainen 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).

  • Apparatus with directivity pattern
    Patent number: 8831248
    Abstract: A loudspeaker is described. The loudspeaker includes two or more segmentations of a planar radiator. Each of the segmentations has an associated frequency dependent velocity magnitude and phase with substantially uniform surface pressure. The two or more segmentations provide a substantially uniform radiation pattern across a wide range of acoustic frequencies. Apparatus, computer readable media and methods are also described.
    Type: Grant
    Filed: August 4, 2011
    Date of Patent: September 9, 2014
    Assignee: Nokia Corporation
    Inventors: Timothy J. Mellow, Leo M. J. Karkkainen
  • Apparatus With Directivity Pattern
    Publication number: 20120033834
    Abstract: A loudspeaker is described. The loudspeaker includes two or more segmentations of a planar radiator. Each of the segmentations has an associated frequency dependent velocity magnitude and phase with substantially uniform surface pressure. The two or more segmentations provide a substantially uniform radiation pattern across a wide range of acoustic frequencies. Apparatus, computer readable media and methods are also described.
    Type: Application
    Filed: August 4, 2011
    Publication date: February 9, 2012
    Inventors: Timothy J. Mellow, Leo M.J. Karkkainen